Etymology and distribution of 私部.

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

Nagano-ken Saku-shi . Terrain . 胡桃沢 variant of. Nagano - ken Saku - shi In Yokane say that Mr. Watanabe came back to the Azuchi - Momoyama era and renamed. There is a transmission from the land which was referred to as Mr. Ogasawara in Muromachi era separately in the same place, called "Kurumi-zawa" near Nagano-ken Higashikuima-gun (old: Chikuma-gun). Location unknown. 渡辺 Watanabe reference. 小笠原 Ogasawara reference.