The Japanese surnames etymology dictionary.
① things . From two bridges. Tell Kanagawa-ken (formerly Sagami country) that Uesugi called it. Estimated in the late Kamakura period and early Muromachi period. 上杉 reference. Shizuoka-ken Hamamatsu-shi Osaki based in Mikkaichi-cho Kita-ku. It was in the Edo period in the same place. The place is a place with Seto bridge over Lake Hamana. Shizuoka-ken Hamamatsu-shi Tells Hamakita Ward that it is a pioneer.