Etymology and distribution of 段坂.

Danzaka 【段坂】^{レベル3
About 200}  The Japanese surnames etymology dictionary.

Iwate-ken Oushuu-shi . A variant of 那須川 . Iwate-Ken Oushuu-Shi in the Maezawa of Iwate-Ken Oushuu-Shi use the "Nana" is bestowed the "large" from Ouchi was the lord of the castle in the Edo era in Maezawa castle of Maezawa gimbals in the sense that "show a large" Tell them that you changed their name from Nasu River surname. Estimated in the Azuchi Momoyama period. 大内 Oouchi reference. There is also a passage that took it as Nasu River surname from Tochigi-ken Nasu-gun as it is located in the same place. Nasu is a place name with a record since the Asuka period. Aomori-ken Hachinohe-shi Uchimaru was in the Edo period in the Hachinohe clan of the clan office. The same clan says that he changed his name from the Nagayukawa family name.