Etymology and distribution of 得津.

Tokutsu 【得津】^{レベル4
About 700}  The Japanese surnames etymology dictionary.

Toyama-ken Uodzu-shi , Kanagawa-ken , Toukyou-to . In Toyama-ken Uodzu-shi tell them that they used the shop name of Ishigakiya in the Edo period.

※ There is a belief that Mr. Qin's descendant added "Satoshi" to Qin using "Flag". Period, location unknown. 秦 Hata reference.