Tominaga 【富永】6 The Japanese surnames etymology dictionary.
Ibaraki-ken Koga-shi . Ibaraki - ken Koga - shi In Higashiyamada it is said that the descendents of Mr. Hojo called Kanagawa - ken Kamakura - shi . Estimated in the Kamakura period. 北条 reference. Chiba-ken Noda-shi Sekijuki Sansui was in the Edo period in the Sekijuku samurai of the Clan office.