Etymology and distribution of 川渕.

Kawabuchi 【川渕】^{レベル5
About 4,000}  The Japanese surnames etymology dictionary.

Toukyou-to , Saitama-ken · Shizuoka-ken .

① There is 工藤 surname. Toukyou-to Shinjuku-ku Ichiyadadacho tells that it was called Nagano-ken Matsumoto-shi from the Edo period.

※ Kyouto-fu Miyadzu-shi Tsuruga was in the Edo period in the clan of Miyazu of the clan government.

② Ainu system . Hokkaidou Oshimashi-chou Yoshimo-chou 's Shishiya was renamed to Kotobayoshi. Estimated in around 1875.

Kawafuchi 【川渕】^{レベル5
About 4,000}  The Japanese surnames etymology dictionary.

宮藤 Miyafuji reference.