Imamizo 【今溝】4 The Japanese surnames etymology dictionary.
Fukui-ken . Ishikawa-ken Kaga-shi Origin of Daishoji - nagi (Uwagi) town. A place name with a record since the Edo period. The same day, Fukui-ken Awara-shi was in Norikura period during the Northern and Morning era. Ishikawa-ken Kanazawa-shi Marunouchi was in the Edo era at the Kaga clan in the Clan office.
※ There is a belief that Mr. Takeda's descendant called Yamanashi-ken in the Kamakura period.