Oyama, Ōyama or Ohyama may refer to: Oyama, Tochigi (), a city in Japan Ōyama, Ōita (), a town in Japan Oyama, Shizuoka (), a town in Japan Mount Ōyama (Kanagawa) (), a mountain in Japan Oyama (Japanese theatre) (), also known as onnagata (), a male actor who plays female parts in Kabuki Oyama, British Columbia, a town in Lake Country, British Columbia, Canada People with the surname Anza Ohyama (born 1976), Japanese singer and actress Heiichiro Ohyama, Japanese conductor and violinist Kana Oyama (born 1984) (), Japanese volleyball player Ōyama Iwao (), Japanese field marshal Oyama Susumu (born 1952), Japanese sumo wrestler Mas Oyama (), karate master , Japanese speed skater , Japanese karateka Shungo Oyama (), Japanese mixed martial artist Takashi Ohyama, Japanese dentist Yasuharu Ōyama (), Japanese shogi player Zac Oyama, a CollegeHumor cast member See also Oyama v. California (1948), a United States Supreme Court case Mount Daisen (Japanese: 大山), written with the same characters as "Ōyama", but using on'yomi reading Koyama (disambiguation) (Japanese: 小山), written with the same characters as the geographical "Oyama", but using an alternative kun'yomi reading Japanese-language surnames