Etymology and distribution of 小伊豆.

Koizu 【小伊豆】^{レベル3
About 100}  The Japanese surnames etymology dictionary.

Chiba-ken , Hokkaidou , Akita-ken .

① Chiba - ken Chiba - shi Inage - ku Sasakabe (Sakusabe) The town has been recorded since the Edo era. The place name was also written as "Sasugi Department". Chiba-ken Sousa-shi I was in the Edo period as a fielder.

② Creation . Akita-ken Yurihonjou-shi In Ishwaki, Tosa's "Sato" and Chosuke Kagoshira of Kochi-ken (formerly Tosa-kun) were the descendants of Mr. Chosuke Nagami, who was the base of the Heian, Kamakura and Muromachi periods. Tell the story that you used "work" in the sense that you combined the "department" and made your last name. It was in the Edo period in the same place. Tosa is a place name with a record since the Asuka period. 長宗我部 Chousokabe reference.