Choosing your "Registered Domicile" aka "Honseki"

Regions and Prefectures of Japan
Your domicile can be anywhere in Japan
Part of the application form (帰化許可申請書 {kika kyoka shinseisho}) for applying for Japanese naturalization requires you to choose your "Registered Domicile" (what it's translated as on Japanese Passports).

It's very similar to choosing one's new name as a Japanese. Unlike most natural born Japanese, who have their name and domicile chosen for them by their parents, naturalized Japanese get to choose it themselves. Like names, there are guidelines as to what is a good choice and what isn't, and naturalized Japanese follow the same rules that natural born Japanese follow. Like family names in Japan, your spouse and dependents must all have the same one.

Your choice affects your driver's license (inside the IC chip), your family register (戸籍 {koseki}), and your Japanese passport (パスポート {pasupōto}旅券 {ryoken}).

Legally, the choice you make affects your day to day life much less than your choice of name: no forms ask for it, and although it may come up, one's choice of domicile never comes up in business conversation, and only rarely comes up in personal conversation. While not trivial to change, you can change it through the courts in the future if you don't like it.

Does it have any connection to where you live?

Famous sign from the Korean War show M*A*S*H
M★A★S★H {マッシュ}
Historically, it did: either to where you currently lived or where your parents or ancestors lived. In modern times, it has absolutely zero connection to where you actually live. It can be almost anywhere you like inside what Japan considers to be its current legal territory (with some important exceptions and surprises: see below).

Also note that the Registered Domicile may not unambiguously specify where you and your family alone lives: the detail level goes down to a particular dwelling / plot of land. You and your family on your family register may be the only people on a plot of land (if the address ends in 番地 {banchi} — meaning 表記 {sho hyōki}). On the other hand, the domicile address may point to a general area with a building or set of building in which hundreds, or even thousands, of people reside (if the domicile address ends in just {ban} — meaning 表記 {kyo hyōki}). And there is also the case of nobody, including yourself, actually living at that address! (more details below)

Unlike the PRC (but similar to ROC), one's residency or domicile can be easily changed with the local authorities and the domicile and/or register does not serve as a tool to limit a resident's movements within Japan.

Expressing your "Roots" or "Origin" in Japan

[family] tree with roots
Your new roots in Japan will
grow & strengthen over time
While most older Koreans with 特別永住者 {tokubetsu eijūsha} (SPRs) SoR (在留資格 {zairyū shikaku}) status that naturalize were born and raised in Japan, other non-Japanese who naturalize can't really say they were born or grew up in a certain place. So if you were to put some thought into it and not pick a place simply because it's convenient to where you live now, or its novelty factor, or its randomness, how would go about picking someplace?

For those who are married, the choice is a little more complicated like family names. Japan, being a society that legally stresses family unity over individuality, requires that spouses and the children who are all on the same family register have the same 本籍 {honseki} (Registered Domicile) in addition to having the same family name.

Where and How I Decided my "Japanese Roots" Are

公団千島団地
My first home: public housing, 11th floor
I first came to Japan in 1993, and the first place I lived and worked was Osaka City. I held various jobs there and moved twice, living in two different wards ( {ku}) — Osaka City has 24 wards compared to Tokyo's 23, (which it calls "special cities" in English).

It was in this city that I learned Japanese, settled into Japanese life, met the person which would become my spouse for decades, and started my career.

To this day, time spent with "the family" (my in-laws) on holiday (ex. New Year's) is spent in Osaka.

If it wasn't for my experiences there, the impression it made on me, and the opportunities I found there regarding career and family, I'm pretty sure I would have never taken Japanese nationality.

Thus, I decided the my Japanese passport should say "OSAKA" for the Registered Domicile.

I chose the same location as my wife within Osaka for convenience, so there was absolutely no change on her part.

Interesting Places Where Your Registered Domicile Can Be

As a general rule of thumb: if the place has an official Japanese postal address with a postal code (郵便番号 {yūbin bangō}) — a three (old) or three+four (new) digit number usually prefixed with the JP symbol: 『〒』 — then a Japanese national can choose it as a Registered Domicile (本籍 {honseki}).

Note that the reverse is not true: Most Japanese postal addresses are not valid Registered Domiciles (本籍 {honseki}), because the domiciles do not specify individual buildings or homes; the "resolution" only extends to the plot or land or block that one or more homes or buildings may be on.

You do not have to choose a place that has no other people. Likewise, you can choose a place that already has people in it. You can even choose a place where it's not possible to live there as a resident due to its location or what is already there. Some examples include:
  • uninhabited and/or uninhabitable islands
  • land areas that civilians are not normally permitted to visit or enter:
    Hashima, "Dead City" in Skyfall 007
    Hashima Island (端島 {Hashima}) aka Battleship Island (軍艦島 {Gunkan-jima})
    Battleship Island was a sea-based coal mining artificial city constructed by Mitsubishi in the early twentieth century and completely abandoned in the early seventies. Thanks to concrete apartment buildings, the tiny island had an incredible amount of people living on it, at one time earning the notorious distinction of being the most densely populated area on Earth (over 5,200 people packed into just 0.06km² of space, which included a graveyard, school, shrine, park, and a medical facility). It is not populated now, and is now known as a tourist site for its ruins (廃墟 {haikyo}) of its concrete buildings and sea walls. The area was mapped by Google Street View and was the lair for a James Bond villain in the movie "Skyfall".
    Minami Torishima Map
    Part of Japan's EEZ
    Marcus Island (南鳥島 {Minamitori-shima})
    Literally translating the Japanese, "South Bird Island" is a Japanese coral atoll. It is only 1km² and has no permanent population, but it does have a runway and a coast guard station, which both Japan and the U.S. use. Geographically, it is the east most island of all of Japan, and it's the only part of Japanese territory on the Pacific tectonic plate.
    Iwo Jima United States Marine Corps War Memorial
    Iwojima (硫黄島 {Iōtō})
    Iwojima is the site of the famous, brutal, and bloody Pacific War battle between the United States and the Imperial Army. The subject of numerous movies (and famous photographs and memorials), you can't freely visit the island without permission (usually granted to veterans during memorial events), but you can set your domicile to the "island of sulfur", which is what the island is named after.
  • land areas currently occupied by foreign countries or are in dispute
  • public facilities or places that are not residential:
    • airports
      Kansai International Airport
      KIX (関西国際空港 {Kansai Kokusai Kūkō})
      Kansai's airport would be a neat place to have a registered domicile if only because the airport is constructed entirely on reclaimed land in the Osaka Bay (大阪湾 {Ōsaka-wan}); the area is entirely on artificial land. It was constructed there to allow for 24 hour operation without disturbing residences. In other words, your domicile can be on 100% artificial land in a bay.
    • train stations
      Shinjuku Station (新宿駅 {Shinjuku-eki})
      Shinjuku Station is the busiest station in the world, with over three million (3,000,000) people using it per day. In other words, more people travel through Shinjuku in a week than the entire populations of Canada, Australia, or the United Kingdom.
      Whity Umeda (ホワイティうめだ {Howaiti Umeda})
      Whity Umeda is an entirely underground shopping complex in the city of Osaka. The stores inside it have their own addresses: over 200 shops in over 30,000m² of space. So if you want to say your domicle is underground, this is possible.
      Whity Umeda: 泉の広場
    • parks
      Takamori SAIGŌ
      西郷隆盛 {SAIGŌ Takamori}
      Ueno Park (上野公園 {Ueno kōen})
      Ueno Park, especially during the nineties, is a beautiful park. It's also infamously known for its unofficial dwellers and squatters and homeless camps. So while it's illegal to actually attempt to erect a domicile there (the police occasionally tear down makeshift structures), you can register it.
    • Cinderella's Castle in Tokyo Disneyland
      Disneyland (in 千葉 {Chiba})
      tourist spots or amusement parks
      TDR: Disneyland & DisneySea
      Some Disney fanatics in the United States go so far as to move and live near the parks in Florida. In America (and in Japan), you can't live in the parks. But you can set your domicile to it.

Places Where Your Registered Domicile Can't Be

The "must have a postal address" rule mentioned above means that you cannot set/register the following places as your domicile:
  • Places not within a prefecture's border (県境 {kengikai}).
    Mount Fuji summit
    No domiciles here.
    The summit (山頂 {sanchō}) of Mt. Fuji (富士山 {Fuji-san})
    As cool as this would be, there are actually parts of Japan, even on the main largest island of 本州 {Honshū}, that literally "fall between the lines" of the 47 prefectures (都道府県 {todōfuken}) of Japan.
  • Areas not registered/owned by any city/town/village (市町村shichōson):
    • While it may be ironic to choose a place that is literally smaller than most apartments in the capital metropolis, these crags, atolls & rocks — administered by the government — can't be registered:
      須美寿島
      No domiciles here either.
      Smith Island / Rock (須美寿島 {SUMISU-tō})
      This is how you would write the English name "Smith" in 漢字 {kanji} (sinograms) in 当て字 {ateji} (sinograms corresponding to foreign sounds) when it was discovered in 1870. Formed by volcanoes, it is only 30m² in area, and erosion has caused it to significantly change shape, according to ships that surveyed it in the early 1990s.
      Sōfu-Iwa
      southernmost Izu Island
      Lot's Wife (孀婦岩 {Sōfugan})
      Just 3.7m² in area, but 100m tall, this volcanic island whose name is derived from an English reference to Genesis 19:26, was used by U.S. warships (submarines) as a reference point during World War Ⅱ.
      But his wife, from behind him, looked back, and she became a pillar of salt.
      There are several tall rocks around the world, including one on a mountain in Israel, named after the wife that according to the Old Testament legend was turned into salt when she looked back at Sodom.
      Bayonnaise (left) ramming into HMS Ambuscade
      Ambuscade & Baïonnaise (1798)
      Bayonnaise Rocks (ベヨネース列岩 {Beyonēsu Retsugan})
      Discovered in 1846 by the French naval corvette vessel "Baïonnaise", this group of rocks was formed by volcanic activity in the mid 20th century is only 10m² in area.
    • Kagoshima Prefecture's (鹿児島県 {Kagoshima-ken}) 鷹島 {Takashima}
      Not to be confused with Nagasaki Prefecture's (長崎県 {Nagasaki-ken}) relatively much larger — pop. ~2,500 and 16.36km² — tourist oriented island of the same name ("Falcon Island") which you can register, it is an uninhabited set of about five rocks, total area 40m², in the East China Sea.
  • Former territories controlled by the dissolved former government of the Great Japanese Empire (大日本帝国 {Dai-Nippon Teikoku}), relinquished as per the Treaty of San Francisco (サンフランシスコ講和条約 {Sanfuranshisuko kōwa jōyaku}):
    the Kuril Islands (千島列島 {Chishima Rettō} / Кури́льские острова́)
    As part of the Peace Treaty with Japan, which officially restored Japan's sovereignty in the international community, Japan had to relinquish claims to the Kuril Islands:
    Artile 2(c). Japan renounces all right, title and claim to the Kurile [sic] Islands, and to that portion of Sakhalin and the islands adjacent to it over which Japan acquired sovereignty as a consequence of the Treaty of Portsmouth of September 5, 1905.
    Torii gate, Japanese building, Sakhalin
    Tourists sightseeing on Russian territory.
    The large island of Сахалин {Sakhalin}, which the Soviet Union took over after it declared war on the Empire of Japan at the end of the Pacific War, contained a large ethnic Ainu population in the southern half of the island — called Karafuto Prefecture (樺太庁 {Karafuto-chō}) at the time. Most of these Ainu fled to 北海道 {Hokkaidō} after the Soviet Union invaded in 1945 and displaced the local Japanese population in 1949. There is very little left of living Ainu culture, written or spoken, today; there are only ten native speakers of the Ainu language (アイヌ語 {Ainu-go}) in the world today in 2015.

7 Famous Places Japanese Register As Their Domicile Yet Can't Live There

All of these places have historical or political significance, thus they are popular choices for people that don't wish to indicate their "ancestral" home or where they were born (either for privacy reasons, because they are making a political statement, because they want to "be different", or because they have a sense of humor) yet they want to choose a place where it's obvious they can't possibly reside at.
  1. Imperial Palace (皇居 {Kōkyo})
    Address
    東京都千代田区千代田1番 {Tōkyō-to Chiyoda-ku Chiyoda 1-ban}
    (Chiyoda block #1, Chiyoda Special City, Tōkyō Metropolis)
    How Many Japanese Have Registered It As Their Domicile
    approximately two thousand
    (in 2010)
    Significance
    大日本帝国御造営之図
    Total area including gardens: 3.41km²
    During the bubble years speculation made this real estate the most valuable property in the world: more than the entire state of California. The Imperial Family lives here, and prior to that, it was the location of the Edo Castle and the Shogunate lived there.

    Because the family actually lives there and needs twenty four hour protection, most of the palace is off-limits for the general public and tourism. The East Gardens and the adjacent Imperial Household Agency can be visited by appointment. Twice a year, on the Emperor's birthday and the day after New Year's Day, the inner gate is opened and the public gathers in front of the main hall where the Emperor and the Imperial Family wish the public well.

    Additionally, the area circumscribing the moat and palace is a popular jogging course and park.

    Similar to how many educated people know the address of the U.S. White House (1600 Pennsylvania Avenue) and the address of the U.K. Prime Minister's Office (10 Downing Street), most educated Japanese know the address of the Imperial Palace: Chiyoda 1-1.

    This is probably why it is the most popular Registered Domicile that no non-royal Japanese can live in. For fun, I've set the "posting location" of this blog post to the address of the Imperial Palace. ☺
  2. Osaka Castle (大阪城 {Ōsaka-jō})
    Address
    大阪府大阪市中央区大阪城1番 {Ōsaka-fu Ōsaka-shi Chūō-ku Ōsaka-jō 1-ban}
    (Osaka Castle block #1, Chuo Ward, Osaka City, Osaka Prefecture)
    How Many Japanese Have Registered It As Their Domicile
    approximately eight hundred
    (in 2010)
    Significance
    Osaka Castle and the main tower
    The traditional surrounded by the modern
    "Osakans" are very proud of their city, their food, and their culture. There are many possible reasons for this, but similar to how some people from Chicago — which is actually a sister city of Osaka — feel they are in the shadow of attention compared to those from New York City, people from Osaka are aware that from a population and economic point of view, they are in third (second if you dismiss Yokohama as the ex-burbs of Tokyo) place to "Tokyoites" the capital. Osaka people also know that historically speaking, Tokyo was not always the center of Japan and that western Japan, especially Osaka, was the heart of the action. Osaka Castle is perhaps a symbol of that rich history as well as a reminder that Osaka's influence has existed for literally over a thousand years.

    Osaka Castle, originally a wooden structure, has been struck by lightning, burned down, exploded (gunpowder armory), and bombed multiple times, so the modern structure is an authentic replica from the outside, but constructed with modern concrete and a museum on the inside (that is even accessible to the disabled due to elevators).

    However, the entire castle grounds, which are a public park, is 60km² and has over a dozen original structures which have been designated as important cultural assets. The 17th century walls, made of interlocked granite from the Seto Inland Sea (瀬戸内海 {Seto Naikai}), without mortar, by various samurai clans, still exist today — you can see the crests of these samurai engraved in some of the rocks.
  3. Hanshin Kōshien Baseball Stadium (阪神甲子園球場 {Hanshin Kōshien kyūjō})
    Address
    兵庫県西宮市甲子園町1番 {Hyōgo-ken Nishinomiya-shi kōshien-chō 1-ban}
    (Kōshien Town block #1, Nishinomiya City, Hyōgo Prefecture)
    How Many Japanese Have Registered It As Their Domicile
    approximately seven hundred
    (in 2011)
    Significance
    2009年夏の甲子園決勝
    The annual National High School Baseball Championship (全国高等学校野球選手権大会 {zenkoku kōtō gakkō yakyū senshuken taikai}) — aka 夏の甲子園natsu no kōshien (Summer of Koshien), in which amateur high school athletes compete from around the nation — similar in popularity and familiarity to the United States' "March Madness" and its NCAA Men's Division Ⅰ Basketball Championship — is held in this western Japan stadium.

    One of the largest stadiums in Asia for its time, it seats 55,000.

    Additionally, Osaka's NPB professional baseball team, the Hanshin Tigers, home field is here (if the Tigers were the Boston Red Sox, then the Tokyo Yomiuri Giants would be the New York Yankees).

    Babe Ruth played an exhibition game here in 1934.
  4. 沖ノ鳥島 {Okinotorishima} ("remote bird islands" aka Okinotori coral reefs/ islands aka "Parece Vela")
    Address
    東京都小笠原村沖ノ鳥島Tōkyō-to Ogasawara-mura Okinotorishima
    (Okinotori Island, Ogasawara village, Tokyo Metropolis)
    How Many Japanese Have Registered It As Their Domicile
    approximately two hundred
    (in 2010)
    Significance
    Okinotori coral reefs
    The southernmost territory of Japan, it is the only part of Japan that is, from a meteorological classification, located in the tropics, in the Philippine Sea. 7.8km² in total area, it is surrounded by concrete to prevent the erosion of more of its rocks. The Japanese coast guard maintains a light beacon on it and a small research station.

    From an administration point of view, it is actually considered to be part of Tokyo's collection of small islands.
  5. The Northern Territories (北方領土 {Hoppō ryōdo})
    Address
    北海道色丹郡色丹村Hokkaidō Shikotan-gun Shikotan-mura
    (…,Shikotan County, Shikotan Village, Hokkaido)
    How Many Japanese Have Registered It As Their Domicile
    approximately a hundred
    (in 2010)
    Significance
    Although the unconditional surrender of the Empire of Japan and the Treaty of San Francisco mention Japan giving up the Kuril Islands, the treaty doesn't specify exactly "what", "which", or "where" the Kuril Islands are. In particular, four islands off the coast of northern Hokkaido, which are close to the Kuril Islands, are not considered to be part of the Kuril Islands mentioned in the Treaty of San Francisco or the Potsdam Declaration because Japan was there prior to Russia ever discovering them and settled them peacefully without Russia's objection. The United States supports Japan's interpretation of the treaty and its position on Japan's sovereignty over the four islands.

    The Soviet Union occupied the four islands in 1945 and Joseph Stalin expelled 17,000 Japanese nationals, replacing them with Soviets. The lack of resolution has prevented Japan from entering into a formal peace treaty with the Soviet Union / Russian Federation.

    Japan has been negotiating with the Russians for decades to a peaceful, fair, and humanitarian (in other words, not affect the lives of the current Russians living on the island in any way) resolution to the dispute. While diplomacy has resulted in a few formal joint diplomatic statements, plans, and declarations, a complete resolution is still not near.
  6. 竹島 {Takeshima}
    Address
    島根県隠岐郡隠岐の島町竹島Shimane-ken Oki-gun Okinoshima-chō Takeshima
    (Takeshima, Okinoshima Town, Oki County, Shimane Prefecture)
    How Many Japanese Have Registered It As Their Domicile
    approximately ninety
    (in 2012)
    Significance
    Takeshima's two main islets
    only 0.2km² with no drinking water
    Sometimes also called the Liancourt Rocks by parties not wishing to recognize either side, the Republic of Korea asked that the 1951 Treaty of San Francisco include Takeshima in the list of territory that Japan must renounce sovereignty over, but this request was explicitly rejected in writing. Nevertheless, the President of the Republic of Korea designated Takeshima as part of South Korea's territory. That territorial designation resulted in the deaths of Japanese fisherman and one Japanese coast guard vessel being shot at which crossed South Korea's line in 1953. Since then, South Korean fishermen and their families have settled there, requiring the South Korean authorities to build infrastructure and maintain staff on the island to provide for them. As the volcanic rock land is not capable of sustaining human life naturally, the amount of artificial resources used to sustain the outpost and occupation has unfortunately caused a large pollution problem in the surrounding waters.

    Japan has tried to settle the dispute legally and peacefully using the mechanisms of international law by asking that the judgement be done by the International Court of Justice. So far, South Korea has rejected all three attempts to let the ICJ mediate and judge on the matter.
  7. Senkaku Islands (尖閣諸島 {Senkaku shotō})
    Address
    沖縄県石垣市登野城 {Okinawa-ken Ishigaki-shi Tonoshiro}
    (Tonoshiro, Ishigaki City, Okinawa Prefecture)
    How Many Japanese Have Registered It As Their Domicile
    approximately twenty
    (in 2010)
    Significance
    Senkaku Islands
    Once had a bonito factory on it (1910~1940)
    Sometimes also called the Pinnacle Islands by parties not wishing to recognize either side, Senkaku is a set of five islets and three rocks on 7km². China began claiming it belongs to them after the discovery of potential oil reserves in 1968. In Japan, this domicile is part of Ishigaki City in Okinawa Prefecture, 150km north of the main island whose primary produce is pineapples and sugar cane and has a population of almost 50,000.

    In 2012, the then governor of Tokyo, 石原慎太郎 {ISHIHARA Shintarō}, attempted to have the local (not national) government purchase the Senkaku Islands from a private Saitama businessman who inherited the land deeds from the previous generations that did business on the land. Fearing that a local government purchase could lead to a change in the status quo (for example, a local government attempting to develop it by adding a park and jetty), the national government purchased it instead to lessen the chance of an international incident.

    However, the action caused the people of China to violently riot, destroy (including arson), vandalize, and loot property/businesses, in addition to incidents of assaulting people — anything perceived to be Japanese — for many days. Additionally, private Chinese fisherman and the PRC military have tried to threaten the Japanese Coast Guard repeatedly (by ramming the vessels or aiming advanced weapons at them via fire control radar) for years, who has been trying to keep anybody — Japanese or non-Japanese — from landing on the territory.

    While Taiwan has also taken the position that Senkaku is its territory, Japan has peacefully made an agreement with Taiwan to allow Taiwanese fishermen to use the Senkaku waters for fishing where the two countries EEZ overlap.

Choosing a Registered Domicile (本籍 {honseki}) That's Not Where You Live and the Actual Location of Your Paper Family Register (戸籍 {koseki})

You don't need to select a registered domicile that's where you actually live or near where you actually live. You don't even need to choose a place that you've ever been to or plan to go to.

However, be aware that if you choose a location that is not near where you live, anytime you do an update or request an official certified copy of your family register (戸籍謄本 {koseki tōhon}), either you or your local city/ward/town/village (市区町村 {shikuchōson}) administrative office (役所 {yakusho}) will need to relay the request via postal mail. This means that getting a copy will take a few days rather than be a same day operation. This is an improvement from earlier days, when doing this via the post office was not possible!

TOKYO ⇔ OSAKA: about 600km
I live in Tokyo, but my domicile is registered as Osaka.
Sometimes, if I need my family register, I call up my mother-in-law, who lives near where my family register is kept, and ask her to retrieve it and mail it to me as this is more convenient than going to the local Ward Office and asking them to retrieve it.

Why this is the case in the 21st century: Much like how other countries keep hard copies of master vital records (ex. birth certificates & death certificates), Japan keeps a hard paper copy of family registers in locations across the country, and the digital versions are "backups".

Japan doesn't keep these records forever; as of 2010, records that are expunged or deleted due to administrative actions (death, loss of nationality, moving to another family register) are only physically maintained for eighty (80) years.

This is often a source of frustration for Japanese-Americans that are attempting to investigate their genealogical roots or prove they are 2nd/3rd generation ethnic Japanese (二世/三世 {nisei/sansei} 日系 {nikkei}) for the purposes of receiving a Long-Term Resident SoR (定住者在留資格 {teijūsha zairyū shikaku}) and don't know where their families' Registered Domiciles (本籍 {honseki}), in other words the location of the Family Registers (戸籍 {koseki}) which is their "proof of legal nationality lineage / connection", are located.

You can never actually get the actual family register even if you go to the physical location where it's located, which is always kept in safe keeping by the government. You can only get "certified copies" of it and make changes through an official government worker at a city/town/ward office. Most of these copies are considered to be void after a period of time — usually three (3) months.

President Obama and his Birth Certificate
『謄本』 {tōhon} ≈ "long form certified copy"
This was the vexing thing about the U.S. President Obama "birther" controversy for many years. People claimed that President Obama never presented the "genuine" original birth certificate. However, the State of Hawaii, like most U.S. States, does not release the actual document to anybody, and only releases certified authentic copies.

What's interesting is that because your Registered Domicile can be in an inaccessible place (such as an unmanned island), the record may be stored as close as possible to your designated location, but it is not actually at the specified address!

Japan has been slowly converting from the B4 vertically printed (縦書き {tategaki}) quasi-analog versions of the 戸籍 {koseki} (family unit / name registers) to digital one printed LTR (横書き {yokogaki}) top-to-bottom on the international A4 paper since 1993; total digital transformation is expected to be completed in 2015 for the sake of national identification — which has already happened for non-Japanese with the 在留カード {zairyū kādo} ([non-Japanese] Residence Card), which will completely replace the non-national locally managed ARC — Alien Registration Card (外国人登録証明書 {gaikokujin tōroku shōmeisho}) — system in 2015 as all the legacy deprecated cards expire. However, they are not completely transitioned yet, and the systems across the country are not yet seamlessly sharing records across the network. In the future, access to one's family register in Japan may not be delayed by geography.

Fortunately, one does not need a copy of their family register, nor do they need to make changes to it, very often; the only time you'd need to do this is due to a life changing event (birth, death, marriage, divorce).

Discrimination and Privacy

Although anyone can change their Registered Domicile (本籍 {honseki}) to anything they like, can change it anytime and as often as they like, and don't need to have them or any member of their immediate or extended family, past or present, have a connection to the place they choose, many people choose a place that does have a connection to their past.

Because of this, there have been concerns that if third parties were able to easily discover one's Registered Domicile (本籍 {honseki}), one may be able to determine if one has associated themselves with an area known for historically discriminated classes of people, such as:
ナコルル {Nakoruru}, a character in SNK's Samurai Shodown
A romanticized video game version of Ainu
  • 在日韓国人・朝鮮人 {zainichi Kankokujin · Chōsenjin} (ethnic Koreans in Japan)
  • アイヌ {Ainu} (Ainu people; see above)
  • 部落民 {burakumin} ("hamlet people"; ostracized outcasts of feudal Japan)
  • 琉球民族 {Ryūkyū minzoku} (natives from the former Ryukyu Kingdom now Okinawa)
Because of this, obtaining one's family register (戸籍 {koseki}) is restricted; not anybody can ask for it; only family members who are listed on it, presenting personal identification, can view copies.

International IDs: Registered Domicile on the Japanese Passport

example Japanese passport
No birthplace, but there is a domicile.
Your Registered Domicile will appear on your Japanese passport if you have one, but for privacy and simplicity reasons it is only listed to the 都道府県todōfuken) (prefectural) level. Thus, there can only be 47 different names in this field.
This assists authorities in differentiating people with the same names without needing to remember the Passport No.
This also means that if you chose someplace really cool as your Registered Domicile (for example, Osaka Castle), you can't really prove it from your passport alone; there's not enough detail.
Interestingly, there's no place of birth on Japanese passports; while the Registered Domicile is likely to be the place of birth for many natural born Japanese, this is not guaranteed.
Many passports list the place of birth even if they are not primarily jus soli (nationality by birth location) based nationality laws. Some countries, like St. Kitts & Nevis, which make it extremely easy (money) to obtain citizenship, have had to re-issue passports with birthplaces on them so that countries can distinguish between those who obtained their nationality at birth (natural born) and those who obtained it simply using money/investment (naturalization); this is to keep their native-born citizens from being treated like those who bought their passport.
Fortunately, although naturalizing to Japan is not difficult for those who have legitimately lived and worked in Japan for many years, there are no shortcuts to acquire it via money, so the lack of birthplace on a Japanese passport is not a problem for other countries.
This means that with the Registered Domicile, naturalized Japanese are treated exactly the same as natural-born "native" Japanese on the passport; you can't prove somebody was naturalized by the information on the passport alone.

Domestic IDs: Japanese Driver's License

Japanese driver's licenses have one's complete 本籍 {honseki} information on them (and on file), but this information is not visible to the naked eye anymore as driver's licenses are one of the most commonly used forms of domestic "photo" identification in Japan, partly because it existed long before the photo 住基カード {jūki kādo} (Resident Basic Info Card) was introduced to the public. It was used so often as a form of identity and address verification rather than being used to verify one's license to operate a motor vehicle, there is a large portion of the public known as "paper drivers" — those who have a license but never actually drive.
日本花子 昭和50年6月1日生 住所 東京都千代田区2−1−2 交付 平成19年06月03日 12345 平成24年07月01日まで有効 優良 第123456789000号
The 本籍 {honseki} used to be below the name and above the address.
They stopped printing the 本籍 {honseki} on the front of the 運転免許証 {unten menkyoshō} (Japanese driver's license) because of the amount of people wanting a form of photo identification that proves name and address yet doesn't reveal one's 本籍 {honseki}, which could subject them to discrimination.

There was a transitional period where the field existed but was left blank on the outside; they did this to:
  1. get people used to the idea that the information wasn't going to be easily visible to third parties anymore
  2. exhaust the existing stock of pre-made license card templates
The information is still available on the IC chip (which is accessed by a NFC contact-less reader less than 9cm away) if you know the eight digit (four+four) PIN which encrypts the information. The chip locks and disables itself if one makes three (3) incorrect guesses in a row.

Non-Japanese and 本籍 {honseki}

Old license of a foreigner
My old license when I was legally American:
1. non-alias "foreign" name in Latin letters
2. 本籍honseki not printed, but 『アメリカ合衆国』Amerika Gasshūkoku in NFC IC
As foreign residents can also have driver's licenses, the 本籍honseki field will have one's 国籍kokuseki (legal nationality), in Japanese, instead. For example, a citizen or national of the United States will display アメリカ合衆国Amerika Gasshūkoku (United States of America) on a terminal after tapping one's license against a NFC terminal and inputting their secret PIN.

In certain cases, immigration may try to use one's Japanese driver's license to ascertain Japanese nationality in exceptional cases when one's Japanese passport can't be presented at CIQ.

Stateless people's 本籍honseki will read 『無国籍』"mukokuseki" ("no nationality").

However, the Japanese driver's license is the only case I know where the 本籍 {honseki} data field is used like a 国籍 {kokuseki} (nationality) field for non-Japanese. Even for the Chinese of Taiwan, which have had the concept of a 本籍 {běnjí} ("Ancestral Home").

台湾 {Taiwan} (ROC/中華民國 {Chūka Minkoku}): 本籍 {běnjí} ("Ancestral Home") ⊃ mainland China

中華民國國民身分證
Note the 本籍 on reverse,
bottom left, second from left
(next to birthplace)
Every national of the Republic of China (aka Taiwan / Chinese Taipei) that has the right of abode and the right to vote has a 國民身分證 {guómín shēnfènzhèng} ([Taiwanese] National Identity Card).

Prior to the current 5th generation card (used from 1993 to present), the card had a field similar to the Japanese 本籍 {honseki} (registered domicile) — same 漢字 {hanzi} (sinograms), with a similar meaning to "registered domicile": "ancestral home" or "home citizenship".

The place written in this area would usually be a place that most of the world thought Taiwan did not have sovereignty over: areas in the People's Republic of China. Older political thought and even older versions of Taiwan's Constitution claimed that the government of the Republic of China was the legitimate (but exiled to Taiwan) government of China (as opposed to the "Communist" government).

The current versions of the cards (1993 onward), in compliance with the Taiwan local identity movements, do not contain this information anymore, and the information is no longer recorded in Taiwan's 戶口簿 {hùkǒu bù} (Chinese family register).

Changing your Registered Domicile

Japanese Passport Amendments and Endorsements page
A Japanese passport's 2nd page (usually blank)
You can change your registered domicile relatively easily compared to changing your name, in case you change your mind after you naturalize. Of course, native born Japanese can also change it.

To do so, you need to fill out a 転籍届 {tenseki todoke} (moving registration form) at your local administration office (役所 {yakusho}).

You will need the following:
  • One copy of your family register (戸籍謄本 {koseki tōhon}) if the new 本籍 {honseki} (registered domicile) is under the jurisdiction of the same local government/municipality (自治体 {jichitai}), otherwise you will need two officially issued copies.
  • Your or your spouse's (depending on who is submitting it) inkan/hanko/chop/seal (印鑑/判子 {inkan/hanko}) that is associated with the identity.
  • The actual 転籍届 {tenseki todoke} (moving registration form). Again, you will need two copies if the change is to a different local government/municipality (自治体 {jichitai})
Only you and/or your spouse can submit the paperwork.

Once this is done and the "breeder document" is changed, you may or may not need to followup and change the following identification and documents:
  • Your 住民票 {jūminhyō} (local resident registration) is automatically updated. No need to do anything.
  • If the change of the registered domicile is to a new prefecture (都道府県 {todōfuken}), you will need to update your passport similar to how one updates or changes one's name. You will need to bring your new updated 戸籍 {koseki} (family register) to your local passport office in addition to your passport.
  • Most other official government IDs (国家免許 {kokka menkyo}) and things like doctor's licenses (医師免許 {ishi menkyo}) only have the prefecture (都道府県 {todōfuken}) written on them, and/or they cannot be changed until the next renewal period, so it's rare that a change is possible or needed.
  • For those that own businesses or property, your 本籍 {honseki} (registered domicile) is not recorded on the deeds or titles registries (登記簿 {tōkibo}), so no update is needed.
  • Your driver's license will need to be updated. You will need to bring your old driver's license plus either your new updated 戸籍 {koseki} (family register) or your updated 住民票 {jūminhyō} (local resident registration) to a local police station that processes driver's licenses. They will update the chip, and will note on the back that the 本籍地 {honseki-chi} (resident domicile location) has been changed — but it will not say what from or what to.
  • Unlike a change in address, there is no need to inform your work or school; the registered domicile is none of their business (see above regarding discrimination) and doesn't affect anything.

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