Etymology and distribution of 一口.

Ichiguchi 【一口】^{レベル3
About 150}  The Japanese surnames etymology dictionary.

Nara-ken , Akita-ken , Oosaka-fu .

① There is a surname of 井岡 . Nara-ken Nara-shi Yokoi, Tokushima-ken Mima-gun Tsurugi-chou Ishike Iku is based. Fukuoka-ken Fukuoka-shi Chuo-ku Castle interior was in the Edo era in the Fukuoka clan in the clan office. 井岡 Ioka reference.

② Akita-ken Yokote-shi birth from Inoka. A place name with a record since the Edo period. Last name was also written as "Inooka". It is unknown whether Inooka exists.

③ Iwate-ken Ichinoseki-shi Birthplace of Sekimi-cho (formerly Inoka). A place name with a record since the Warring States Period. It was in the Muromachi period in the same place.

Ikkou 【一口】^{レベル3
About 150}  The Japanese surnames etymology dictionary.

Oosaka-fu , Gifu-ken , Wakayama-ken .

① Oosaka-fu Kishiwada-shi Origin of Imaki-cho. A place name with a record since the Edo period.

② Okayama-ken Setouchi-shi Originated from the vicinity of Okuta Oku-cho (Old: now Tree). A place name with a record in the Warring States Period.

* Kyouto-fu Originated from the present tree near Uji-shi (old: Uji-gun). Period, location unknown. There was a family name of Imaki Ren in the Nara period.

Imoarai 【一口】^{レベル3
About 150}  The Japanese surnames etymology dictionary.

Ooita-ken Usa-shi , Fukuoka-ken . Ooita-ken Usa-shi Originated from floating castle of Hosomi's hiding street. It is distributed in the same place.

Kazuguchi 【一口】^{レベル3
About 150}  The Japanese surnames etymology dictionary.

芟花 Karuka reference.

Hitokuchi 【一口】^{レベル3
About 150}  The Japanese surnames etymology dictionary.

森清 Morikiyo reference.