Etymology and distribution of 古株.

Kokabu 【古株】^{レベル3
About 400}  The Japanese surnames etymology dictionary.

Niigata-ken , Miyazaki-ken , Hiroshima-ken .

① Creation . Niigata-ken Sado-shi In Mizu, Heike Futoshinari of Heike fell after 1180 (4 years of jurisdiction) to 1185 (2 years old and 4 years of senba) Ishikawa-ken Wajima-shi Tell her that she retired in the fourth place and called it to conceal the fourth place on the rank. The fourth place is a place name with a record since the Edo period. Niigata - ken I came to Sado - shi as an early Edo period as estimated from tradition. 平 Taira reference.

② Topography . From the place to draw the vertebrae and water. Miyazaki-ken Miyazaki-shi There is distribution on Shimodajima in Saharahara-cho.