Etymology and distribution of 小古井.

The Japanese surnames etymology dictionary.
https://play.google.com/store/apps/details?id=info.jigensha.jcedfreeGoogle Play で手に入れよう https://apps.apple.com/us/app/id1471109324
↑オフライン検索できるアプリもどうぞ
在日通名大全

日本初、在日通名の研究書「在日通名大全」発売中!
ネットの電話帳 住宅地図 マッポン!

小古井さんの分布

Population

Distributions by prefecture
都道府県分布数図
Distributions by city
市区町村分布数図
Distributions by subregion
小地域分布数図
Whole Japan Prefectures
レベル3 1 Nagano-ken(About 100)
2 Saitama-ken(About 10)
3 Niigata-ken(About 10)
4 Ibaraki-ken(Very rare)
4 Toukyou-to(Very rare)
PopulationAbout 130
Ranking27,353
Rank by city
1 Nakano-shi(About 60)
2 Shimotakai-gun Yamanouchi-machi(About 20)
3 Nagano-shi(About 10)
4 Kamitakai-gun Obuse-machi(About 10)
5 Jouetsu-shi(Very rare)
5 Choufu-shi(Very rare)
5 Kawagoe-shi(Very rare)
5 Wakou-shi(Very rare)
5 Tokorozawa-shi(Very rare)
5 Niigata-shi(Very rare)
Rank by subregion
1 長野県 中野市 中野松川(About 20)
2 長野県 中野市 岩船(About 10)
2 長野県 中野市 中央(About 10)
2 長野県 下高井郡山ノ内町 佐野(About 10)

Distributions of ratios

Distributions of ratios by prefecture
都道府県分布比率図
Distributions of ratios by city
市区町村分布比率図
Distributions of ratios by subregion
小地域分布比率図
Whole Japan Prefectures
Ratios0.000103% 1 Nagano-ken(0.00361%)
2 Niigata-ken(0.000322%)
3 Saitama-ken(0.00022%)
4 Ibaraki-ken(0.000142%)
5 Toukyou-to(Very rare)
Rank by city
1 Nakano-shi(0.102%)
2 Shimotakai-gun Yamanouchi-machi(0.094%)
3 Kamitakai-gun Obuse-machi(0.0648%)
4 Wakou-shi(0.00955%)
5 Kashima-shi(0.00701%)
6 Nagano-shi(0.00309%)
7 Choufu-shi(0.00286%)
8 Jouetsu-shi(0.00182%)
9 Tokorozawa-shi(0.00162%)
10 Kawagoe-shi(0.00155%)
Rank by subregion

Notable cities

Kamitakai-gun Obuse-machi , Shimotakai-gun Yamanouchi-machi , Nakano-shi

マッポン! で分布を見る