Kawai 【川合】6 The Japanese surnames etymology dictionary.
Kanagawa-ken , Ibaraki-ken , Toukyou-to . Chiba-ken Katori-gun Tounoshou-machi Originated from the vicinity of Miyamoto (formerly Tachikawa (Kitakawa) Township). A place name with a record in the Heian period. Kanagawa-ken Naka-gun Ninomiya-machi It was one color in the Edo period. Ibaraki-ken Kasama-shi Hiramachi was in the Edo era in the Shishido clan of the clan office.