Kouchi-ken , Toukyou-to . There is a surname including "Oka". It was in the Edo period in Kouchi-ken Kounan-shi .
Yamaguchi-ken . Yamaguchi-ken Shuunan-shi Meiji New surname by monk of Kanonji temple in Saoto sect. The land is inland. There are examples where Oki means "back".
| Whole Japan | Prefectures | |
|---|---|---|
| レベル | 3 |
1 Ehime-ken(About 20) 2 Fukuoka-ken(About 20) 2 Miyagi-ken(About 20) 4 Shimane-ken(About 10) 4 Yamaguchi-ken(About 10) 4 Oosaka-fu(About 10) 7 Tottori-ken(About 10) 7 Nagasaki-ken(About 10) 7 Kyouto-fu(About 10) 10 Kouchi-ken(Very rare) |
| Population | About 140 | |
| Ranking | 25,487 | |
| Rank by city |
|---|
|
1 Hamada-shi(About 10) 2 Itoshima-shi(About 10) 2 Ube-shi(About 10) 2 Matsuura-shi(About 10) 2 Uwajima-shi(About 10) 2 Seiyo-shi(About 10) 2 Iwami-gun Iwami-chou(About 10) 8 Miyoshi-shi(Very rare) 8 Fukuoka-shi Minami-ku(Very rare) 8 Fukuoka-shi Jounan-ku(Very rare) |
| Rank by subregion |
|---|
|
1 島根県 浜田市 上府町(About 10) 2 長崎県 松浦市 鍋串免(About 10) 2 鳥取県 岩美郡岩美町 浦富(About 10) 2 愛媛県 宇和島市 法花津(About 10) |
Emisu 【恵美須】レベル3
About 140 are referenced.
