Etymology and distribution of 大槌.

Oodzuchi 【大槌】^{レベル3
About 300}  The Japanese surnames etymology dictionary.

Nagano-ken Komoro-shi . Terrain . From ridges and swamps. Nagano-ken Komoro-shi Ryohei is based. It was in the Edo period in the same place. Nagano-ken Kitasaku-gun Miyota-machi Near the Maji-cho (old: Onuma (Onuma)) is a place name with a record since the Heian period.

※ Shimane-ken Hamada-shi Tatei - machi was in the Edo period in Hamada Samurai of the Clan Office.

Ootsuchi 【大槌】^{レベル3
About 300}  The Japanese surnames etymology dictionary.

Ibaraki-ken , Toukyou-to , Fukushima-ken .

① Topography . From a small swamp. Tell the place name of Fukushima-ken western part (formerly Iwashiro country). Period, location unknown. Fukushima - ken Kitakata - shi Kumakura - cho Sincheon Konuma Koshi is a place name with a record since the Edo period. Fukushima-ken Iwase-gun Ten'ei-mura It was in Warring States period in Osato.

② variant 小野間 . In Shizuoka-ken tells that Ono is a vassal of Takeda Shingen who is the battle commander of the Warring States era with Yamanashi-ken as the base. 小野間 Onoma reference.