Kagoshima-ken Amami-shi , Oosaka-fu . There is Oka in the surname of Kagoshima-ken 's Amami archipelago. There is a word of "the first son". 岡 reference.
| Whole Japan | Prefectures | |
|---|---|---|
| レベル | 3 |
1 Ehime-ken(About 30) 2 Hyougo-ken(About 20) 3 Oosaka-fu(About 10) 4 Aichi-ken(Very rare) 4 Gifu-ken(Very rare) |
| Population | About 60 | |
| Ranking | 39,718 | |
| Rank by city |
|---|
|
1 Iyo-shi(About 20) 2 Akashi-shi(About 10) 3 Sakai-shi(About 10) 4 Iyo-gun Masaki-chou(Very rare) 4 Hashima-shi(Very rare) 4 Nagoya-shi Midori-ku(Very rare) 4 Shikokuchuuou-shi(Very rare) 4 Koube-shi Tarumi-ku(Very rare) |
| Rank by subregion |
|---|
|
1 愛媛県 伊予市 出渕(About 10) |
