Yanagawa 【楊川】3 The Japanese surnames etymology dictionary.
② Yamaguchi-ken Yamaguchi-shi Yoshagawa is a place name recorded with the notation "河川" in the Kamakura period. The place name was also written as "Kagawa" and "Kagawa". It is distributed in Chiba-ken Kamogawa-shi . Chiba-ken Kamogawa-shi Yokoagi was in the Hanabusa clan who existed from 1868 to 1871 at the clan office.