Hirokawa 【広川】5 The Japanese surnames etymology dictionary.
Kumamoto-ken , Miyazaki-ken , Kagoshima-ken . Kumamoto-ken Kuma-gun Sagara-mura Origin of Yanase Ningiko. A place name with a record since the Kamakura period. Kumamoto-ken Minamata-shi , Miyazaki-ken Miyazaki-shi Uedajima was in the Edo era, the western part of Kagoshima-ken (formerly Satsuma country) in the Sengoku period in the Clan Sadahara of the Clan office.