Seiji Miyaguchi (宮口精二, Miyaguchi Seiji, 15 November 1913 – 12 April 1985) was a Japanese stage and film actor[1][2][3] who appeared in films of Akira Kurosawa, Yasujirō Ozu, Mikio Naruse, Keisuke Kinoshita, Tadashi Imai and many others.

[2][3] In 1949, he received the Mainichi Theater Award for his performance in Onna no issho and other plays.

[4] Notable performances include Akira Kurosawa's Seven Samurai and Yoshitarō Nomura's Stakeout.

[2] In addition, he starred in television productions like the Taikōki series.

[3] A character designed as a caricature of Miyaguchi is regularly featured in the cat-oriented manga Mon-chan and Me, published in Fusosha's popular[5] webzine Joshi Spa!