Etymology and distribution of 当時.

Touji 【当時】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Kagoshima-ken Ooshima-gun Setouchi-chou , Kyouto-fu Kyouto-shi , Toukyou-to . Toukyou-to also includes distribution of Yotsunoya.

① Creation . First letter surname of Amagi archipelago of Kagoshima-ken .

② things . Toukyou-to tells us that he served the shrine and carried a shikigami with four sticks. The pronunciation is Yotsunoya.

※ In Nagano-ken there was a case where Genji's descendant in the Heian era referred to the name of a surname on Nakatsu. It is unknown whether Nakatsu-ki will exist. 源 Minamoto reference.