Sudou 【須藤】6 The Japanese surnames etymology dictionary.
① Kagoshima-ken Kagoshima-shi The birthplace of Kamitaniguchi town. A place name with a record since the Edo period. In the Kamakura period the name of the place called "Taniguchi". It is based in the same place.
② Topography . Kagoshima-ken Kagoshima-shi From the Taniyokuchi gate of the gate division system which was in the Edo era in Haruyama Town. The gate name is from the entrance of the valley.