Etymology and distribution of 乗口.

Noriguchi 【乗口】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Oosaka-fu , Kyouto-fu , Toukyou-to . Korean type . Originated in Changwon City, Gyeongsangnam Province, Korea. There is a record of naturalization on Osaka-fu Katano-shi on March 4, 1993. The real name is yellow. 黄 Kou reference. There is also a real name in the last name. 丁 Chou reference.