Inagawa 【稻川】1 The Japanese surnames etymology dictionary.
Yamanashi-ken , Toukyou-to , Shizuoka-ken . Terrain . From the new sawa. Yamanashi-ken Koufu-shi I was in Warring States in Miyamae-cho. Tell him that he came from Yamanashi-ken Minamiarupusu-shi Shimomiya in the same place. Shizuoka-ken Kakegawa-shi Azuchi Momoyama period in the high Tenjin Castle of the Upper and the Shimokei , Fukuoka-ken Kitakyuushuu-shi Ogakura-ku Castle interior was in the Edo period in the Kokura clan in the clan government. I say that the same clan was Imamura surname. 今村 reference.