Etymology and distribution of 保氣口.

Hokiguchi 【保氣口】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Ibaraki-ken Koga-shi , Gunma-ken , Saitama-ken . Tochigi-ken Mooka-shi Birth of a young trip. A place name with a record since the Edo period. The name of the place is said to have been called "Waka Journey" from around 901 to 923 (Year of the Year of the Year) with the name "Wakayama Department" pioneered by the Wakayama Department (Wakayama). Wakamatsu Department, Wakasa Waka Department is unknown whether it exists.