Etymology and distribution of 古世古.

Koseko 【古世古】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Shimane-ken Hamada-shi · Shiga-ken , Kyouto-fu .

① Shimane-ken Hamada-shi In Kofuku-machi I tell him I was engaged in agriculture. Estimated in the Edo period. There is a 静間 surname in the same place. 静間 Shizuma reference.

② Korean type . Creation . "Shita" is used from Shizu in the sun's kun reading. There is a record of naturalization on Kyouto-fu Jouyou-shi on March 17, 1994. It is also "a seed book". The real name is sinking. It is unknown whether the deposit exists. 沈 Chin reference.