Etymology and distribution of 小間海.

Komagai 【小間海】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Gifu-ken Gifu-shi . Summary . Synthesis of the island part and Otsuka. In Kuroino of Gifu - ken Gifu - shi I tell him that it was between Mr. Isamu and Mr. Otsuka. Estimated in the Edo period. 島部 Shimabe reference. 大塚 Ootsuka reference.