Etymology and distribution of 當津.

Toutsu 【當津】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Shizuoka-ken Numadzu-shi . Korean type . Originated in Sucheon city, South Gyeongsangnam province. There is a record of naturalization on Kanagawa-ken Kawasaki-shi on October 2, 1963. The real name is Mutsu. 睦 Mutsu reference.