Kawashima 【川島】6 The Japanese surnames etymology dictionary.
Yamanashi-ken Tsuru-shi . Creation . Yamanashi-ken Tsuru-shi tells that Kanagawa-ken Kamakura-shi Yukinohashi Komachi got from the general of Kamakura shogunate of the government in the sense that it dedicates the arrow root in the Kamakura period to give "a person who is rare" (kidai). Kyouto-fu tells that he gave a sword to Yoritomo who is the warrior of the Heian period and the Kamakura period and gave it in the meaning of "a sword's name sword".