Etymology and distribution of 通場.

Tsuuba 【通場】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Toyama-ken , Yamanashi-ken , Niigata-ken .

① Yamanashi-ken Koufu-shi Birth of Nanazawa Town. A place name with a record since the Edo period. The place name was also written as "Narazawa" and there was pronunciation of Narasawa as well.

② Chiba-ken Narita-shi birth of Nanasawa. A place name with a record since the Edo period.

③ Kanagawa-ken Atsugi-shi birth of Nanasawa. Place name with a record since the North / South morning era. The place name was also written as "Narazawa" and there was pronunciation of Narasawa as well.