Aichi愛知県
Aichi-ken, あいちけん. The name ends in 県 (ken), prefecture.
Aichi is Japan's manufacturing centre. Nagoya, the largest city between Tokyo and Osaka, is here.
Facts
- Japanese name
- 愛知県
- Reading
- Aichi-ken / あいちけん
- Region
- Chūbu 中部
- Capital
- Nagoya 名古屋市
- Population
- 7,542,415 (2020 census)
- Area
- 5,173 km²
- Density
- 1,458 people per km²
- Municipalities
- 54: 38 cities, 14 towns, and 2 villages
- Designated cities
- Nagoya City
- Districts (郡)
- 7
- Codes
- JIS 23, ISO 3166-2 JP-23
- Website
- www.pref.aichi.jp
- Tree
- hananoki maple ハナノキ
- Flower
- rabbit-ear iris カキツバタ
- Bird
- scops owl コノハズク
The tree, flower, and bird are the prefectural symbols, chosen by ordinance. Every prefecture has all three.
The most populous municipalities
| Municipality | Population | km² | Share |
|---|---|---|---|
| Nagoya City名古屋市 | 2,332,176 | 326.5 | 30.9% |
| Toyota City豊田市 | 422,330 | 918.32 | 5.6% |
| Okazaki City岡崎市 | 384,654 | 387.2 | 5.1% |
| Ichinomiya City一宮市 | 380,073 | 113.82 | 5.0% |
| Toyohashi City豊橋市 | 371,920 | 261.86 | 4.9% |
| Kasugai City春日井市 | 308,681 | 92.78 | 4.1% |
| Anjo City安城市 | 187,990 | 86.05 | 2.5% |
| Toyokawa City豊川市 | 184,661 | 161.14 | 2.4% |
| Nishio City西尾市 | 169,046 | 161.22 | 2.2% |
| Kariya City刈谷市 | 153,834 | 50.39 | 2.0% |
2020 census. Share is the municipality's part of the prefecture's population. The other 44 are listed below.
How an address here begins
愛知県名古屋市…
Aichi-ken, Nagoya-shi, …
The prefecture name is written first, then the municipality name, then the name of one of Nagoya's 16 wards. The guide explains the rest of the address, and the map finds any address you paste into it.
Neighbouring prefectures
Every municipality in Aichi市区町村
54 local governments, each with its own mayor and assembly. Each has a page with its population, area, neighbours, and boundary on the map.
Designated city政令指定都市
A designated city is divided into wards. The wards are offices of the city, not governments.
Other cities市
- Toyohashi City豊橋市
- Okazaki City岡崎市
- Ichinomiya City一宮市
- Seto City瀬戸市
- Handa City半田市
- Kasugai City春日井市
- Toyokawa City豊川市
- Tsushima City津島市
- Hekinan City碧南市
- Kariya City刈谷市
- Toyota City豊田市
- Anjo City安城市
- Nishio City西尾市
- Gamagori City蒲郡市
- Inuyama City犬山市
- Tokoname City常滑市
- Konan City江南市
- Komaki City小牧市
- Inazawa City稲沢市
- Shinshiro City新城市
- Tokai City東海市
- Obu City大府市
- Chita City知多市
- Chiryu City知立市
- Owariasahi City尾張旭市
- Takahama City高浜市
- Iwakura City岩倉市
- Toyoake City豊明市
- Nisshin City日進市
- Tahara City田原市
- Aisai City愛西市
- Kiyosu City清須市
- Kitanagoya City北名古屋市
- Yatomi City弥富市
- Miyoshi Cityみよし市
- Ama Cityあま市
- Nagakute City長久手市
Districts, with their towns and villages郡 町 村
A district is a name that groups towns and villages in an address. It has no office and no election. Each town and village in it is a government.
Questions about Aichi
- What is the capital of Aichi?
- Nagoya (名古屋市). The prefectural office is there. It is also the largest municipality in the prefecture. It is a designated city, divided into wards.
- What does 県 mean in 愛知県?
- 県 (ken) means prefecture. It is the ordinary word for prefecture, used by 43 of the 47. The other four are Tokyo (都), Hokkaidō (道), Osaka, and Kyoto (府), which are the same kind of government with a different word at the end of the name.
- How many municipalities are in Aichi?
- 54: 38 cities, 14 towns, and 2 villages. Each is a local government with its own mayor and assembly. One of them is a designated city, divided into wards: Nagoya City (16 wards). The wards are offices of the city, not governments. The towns and villages are grouped into seven districts (郡), names used in addresses, not governments.
- What is the population of Aichi?
- 7,542,415 at the 2020 census, on 5,173 km², which is 1,458 people per km². Aichi is the 4th most populous of the 47 prefectures and the 27th largest by area.
- Which prefectures border Aichi?
- Four prefectures: Nagano (長野県), Gifu (岐阜県), Shizuoka (静岡県), and Mie (三重県). Borders across water are not counted.
- What region is Aichi in?
- Chūbu (中部). A region is a customary grouping of prefectures, not a government, so Aichi elects a governor and an assembly but the region elects nothing.
- How is Aichi written in Japanese?
- 愛知県, read Aichi-ken and written あいちけん in hiragana. The last character, 県, is the word for prefecture, and the name is often used without it in English.
- How does an address in Aichi begin?
- With the prefecture name, then the municipality name: 愛知県名古屋市… (Aichi-ken, Nagoya-shi, …). In Nagoya the ward name is written after the city name, since it is a designated city. After that are written the named area, the chōme, the block, and the building number.
- What is the largest city in Aichi?
- Nagoya City (名古屋市), with 2,332,176 people at the 2020 census. It is also the capital. The three most populous municipalities are Nagoya City (名古屋市, 2,332,176), Toyota City (豊田市, 422,330), and Okazaki City (岡崎市, 384,654).
- What are the symbols of Aichi?
- The prefectural tree is the hananoki maple (ハナノキ), the flower the rabbit-ear iris (カキツバタ), and the bird the scops owl (コノハズク). Aichi chose them by ordinance, as every prefecture has.
Boundaries: MLIT 国土数値情報. Population: 2020 Population Census (令和2年国勢調査). Area: Geospatial Information Authority of Japan (全国都道府県市区町村別面積調, 2020). Municipality counts are from the boundary data on the map. Website and symbols: the prefecture's Japanese Wikipedia article, read in September 2026.