Kokubo 【小久保】6 The Japanese surnames etymology dictionary.
Hokkaidou , Oosaka-fu , Nagasaki-ken . Terrain . From bamboo and rice fields. In Okayama-ken Takahashi-shi tell Kyouto-fu Kyouto-shi it was called from the Heian era. Oosaka-fu Eastern (formerly: Kawachi country) to the north and south morning era, Nagasaki-Ken Shimabara-Shi castle is the clan Agency Shimabara samurai, Nagasaki-Ken Hirado-Shi rock town of Han Agency Hirado samurai, Tokushima-Ken Tokushima-Shi , It was in the Edo period in Ehime-ken Seiyo-shi . Tokushima-ken Mima-gun Tsurugi-chou Tell the Sadako River that it is Meiji New surname . Mie-ken Inabe-shi Tell him that he was engaged in agriculture at Iikura in Kita-cho. Estimated in the Edo period.