What is "yaguchi"

is a Japanese surname. Notable people with the surname include:

• Mari Yaguchi, a Japanese pop singer
• Masaki Yaguchi, guitarist for the Japanese rock band called Mucc
• Shinobu Yaguchi, a Japanese film director and screenwriter
• Yoko Yaguchi, a Japanese actress, and the wife of Japanese filmmaker Akira Kurosawa for 39 years
• Yukihiko Yaguchi, a Japanese car designer
• Yutaka Yaguchi, a martial artist