Etymology and distribution of 土佐田.

Tosada 【土佐田】^{レベル3
About 50}  The Japanese surnames etymology dictionary.

Niigata-ken , Hyougo-ken , Miyazaki-ken . Distribution including Hatta.

① Mie-ken Iga-shi Originated from Harada (Hatta). A place name with a record since the Heian period. Niigata-ken Nagaoka-shi Board of editors was founded in the Edo period as a clan sermon of the Clan office. Niigata-ken Tsubame-shi Yoshida Shimonakano (formerly known as Harada (Hatta)) is a place name with a record since the Muromachi Period.

② Mie-ken Inabe-shi Originated from Higashi village in Hokuto-cho (formerly known as Hida). A place name with a record since the Kamakura period.

※ Topography . From the developed field. There was Saita's family name in the Heian era in Shiga-ken Nagahama-shi (formerly Asai gun).