Nishida Ken (born June 24, 1945) is a Japanese actor and voice actor. He is noted for his roles in Return of Ultraman, Eyeful Daisakusen, Uchuu Keiji Gavan, Ninpuu Sentai Hurricaneger, G-Men '75, and Shin Kyoto Meikyuu Annai. His guest roles have included multiple episodes of Key Hunter, Mito Koumon, Taiyou ni Hoero!, Zenigata Heiji, and Abarenbou Shougun. He is also a regular guest star in the two-hour prime-time special drama format, with 35 appearances on the Tuesday Kayou Suspense Gekijou and 25 on the Saturday Doyou Wide Gekijou. A veteran jidaigeki actor, Nishida portrayed the recurring villain Mugensai who masterminded the plot to assassinate the shogun in the series Shogun Iemitsu Shinobi Tabi Part II. He appeared as Asano Daigaku, younger brother of the daimyo whose forced seppuku triggered the events of the Forty-seven ronin, in The Fall of Ako Castle. A modern role was in the 1986 Kei Kumai film adaptation Umi to Doku of the Shusaku Endo novel of the same name (translated as The Sea and Poison). Three films in the Gokudou no Onna-tachi series of gangster films are also to his credit. In anime, Ken provided the Japanese voice of Gouda Kazundo in Ghost in the Shell: S.A.C. 2nd GIG.