Yamaguchi may refer to:
People
Yamaguchi (surname), the 14th most popular Japanese surname, including a list of people.
Places
Yamaguchi Prefecture, the westernmost prefecture of Honshū island of Japan
Yamaguchi (city), capital of Yamaguchi Prefecture
Yamaguchi Station (Yamaguchi), a JR West railway station, located in the center of Yamaguchi-shi Shin-Yamaguchi Station, a railway station in Yamaguchi-shi (Sanyō Shinkansen line) Yamaguchi, Nagano, a village in Nagano Prefecture
Fiction
Kumiko "Yankumi" Yamaguchi, the character played by Yukie Nakama in Gokusen, a Japanese TV show Yamaguchi-sensei, a doctor in the manga/anime series Fighting Spirit U.S.S. Yamaguchi, an Ambassador Class Federation starship in the Star Trek franchise Yamaguchi Digital Pets, a fictional digital pets company mentioned in Fanboy & Chum Chum Yamaguchi Tadashi, a member of the Karasuno volleyball club in the manga/anime series Haikyu!!
Other uses
Yamaguchi Bank, a major regional bank in Japan, primarily in the Yamaguchi prefecture Yamaguchi Bicycles, a custom bike frame builder in Rifle, Colorado Yamaguchi Broadcasting (later named KRY), a Japanese television and radio broadcasting company Yamaguchi Dam (China), a dam in northwest China Yamaguchi Dam (Nagano), a dam in Nagano Prefecture, Japan Yamaguchi Prefectural University Yamaguchi Ube Airport Yamaguchi University Yamaguchi-gumi, a yakuza group 15841 Yamaguchi, an asteroid named for the Japanese prefecture Sweden v. Yamaguchi Yamaguchi esterification, a chemical reaction