Etymology and distribution of 片角.

Katasumi 【片角】^{レベル3
About 60}  The Japanese surnames etymology dictionary.

Kyouto-fu . Kyouto-fu Kyouto-shi Originated from Kawashima (Kawashima) in Saigyo Ward. A place name with a record since the Heian period. The place name was also written as "leather island" and "kawashima". In the same place the surname was written as "Kawashima" during the Warring States Period.