Etymology and distribution of 下船.

Shimofune 【下船】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Okayama-ken Tsuyama-shi , Hokkaidou , Oosaka-fu . Distribution including Tanosoto too. Summary . Tanaka's abbreviation. Okayama-ken Tsuyama-shi Takao tells that when Mr. Tanaka defeated the battle and came back home, he remained "Da" and called it. Estimated in the Warring States Period. 田中 Tanaka reference. Tanosoto at Hokkaidou .