Okitsu 【沖津】5 The Japanese surnames etymology dictionary.
Nagano-ken , Niigata-ken . Nagano-ken Hanishina-gun Sakaki-machi Originated from Onozawa in Shimpei's underworld. It was in Nagano-ken during the Kamakura period. Nagano-ken Higashichikuma-gun Asahi-mura Onozawa was a place name with a record since the Azuchi-Momoyama period. The place name was also written as "Azawa."