This repository contains a list of all administrative divisions with standard area codes in Japan as of April 26, 2022.
All tables are in UTF-8 tab-separated values (TSV) format.
0-all.tsv contains all administrative divisions, whereas each of other 4 files contain only one level with irrelevant fields omitted.
| Field | Description |
|---|---|
| level | Level of the entity as described below (level 0 only) |
| code | 5-digit standard area code |
| pref | 2-digit prefecture code |
| psub | Prefecture subdivision which the municipality belongs to (level 3 only) |
| muni | Municipality which the ward belongs to (level 4 only) |
| full-ja | Name in kanji with suffix |
| full-ja-hira | Name in hiragana with suffix |
| full-en | Name in romaji with suffix |
| base-ja | Name in kanji without suffix |
| base-ja-hira | Name in hiragana without suffix |
| base-en | Name in romaji without suffix |
| type | Type of the entity as described below |
| county | County (type 24) which the municipality belongs to (level 3 only) |
| subpref | Subprefecture (types 25, 26, and 27) which the municipality belongs to (level 3 only) |
| Field | Description |
|---|---|
| type | 2-digit Type code |
| ja | suffix in kanji |
| ja-hira | suffix in hiragana |
| en | suffix in English |
See notes on English/Romaji names below.
| Field | Description |
|---|---|
| code | 5-digit standard area code |
| GSI-rules | Name based on Notation Rules of Geographic Names, etc. in English by Geospatial Information Authority of Japan (GSI) |
| GSI-map | Name on English basemap in GSI map |
| MLIT | Name from webland API by Ministry of Land, Infrastructure, Transport and Tourism (MLIT) |
| official | Name used by the municipality's official website |
| url | URL of municipality's official website |
Administrative divisions are classified into "types" based on what suffixes are used. Types are assigned 2-digit codes, where the first digit shows the level of the administrative divisions.
| code | description | count |
|---|---|---|
| 1 | Prefectures | 47 |
| 11 | metropolis/to | 1 |
| 12 | prefecture/do | 1 |
| 13 | prefecture/fu | 2 |
| 14 | prefecture/ken | 43 |
| 2 | Prefecture subdivisions | 462 |
| 21 | designated city | 20 |
| 22 | special ward area (Tokyo) | 1 |
| 23 | city area | 47 |
| 24 | county | 376 |
| 25 | general subprefectural bureau (Hokkaido) | 9 |
| 26 | subprefectural bureau (Hokkaido) | 5 |
| 27 | branch office (Tokyo islands) | 4 |
| 3 | Municipalities | 1747 |
| 31 | designated city | 20 |
| 32 | city | 772 |
| 33 | special ward (Tokyo) | 23 |
| 34 | town/machi | 277 |
| 35 | town/cho | 466 |
| 36 | village/mura | 161 |
| 37 | village/son | 28 |
| 4 | Wards | 175 |
| 41 | ward | 175 |
Some entities in Hokkaido have identical names.
- Tomari Village
01403Shiribeshi General Subprefectural Bureau, Furuu County01696Nemuro Subprefectural Bureau, Kunashiri County, part of disputed Northern Territories
- Kamikawa County
01830former Ishikari Province01832former Teshio Province01857former Tokachi Province
- Nakagawa County
01833former Teshio Province01860former Tokachi Province
2 towns named Esashi Town (01361 and 01514) can be distinguished by their names in kanji. (江差町 and 枝幸町 respectively)
Each designated city constitutes a prefecture subdivision by itself. To make the hierarchical structure consistent, each designated city has an entry duplicated in levels 2 and 3 with types 21 and 31.
Hokkaido uses subprefectures instead of counties to assign codes to towns and villages, even though there are counties in Hokkaido. Because the counties do not have official 5-digit standard area codes, I assigned them codes between 01801 and 01876.
These county codes are by no means official, and only exists to provide information about which town/village belongs to which county.
Romaji spelling of administrative divisions follows Notation Rules of Geographic Names, etc. in English by Geospatial Information Authority of Japan (GSI) in the tables. However, There are several instances where an entity's name has more than one romanized spelling. For example, 27220 箕面市(みのおし), Osaka Prefecture is romanized Minoo City based on the GSI rules, but the city officially prefers Minoh City.
Such variations are summarized in spelling-variants.tsv. This list may be expanded as more of such inconsistencies are found.
English names of suffixes follow the GSI rules as much as possible. When a term is not specified, one from English Wikipedia is used.