Oyama, Ōyama or Ohyama may refer to:

People with the surname

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  • Aemu Oyama (大山 愛笑, born 2004), Japanese footballer
  • Anza Ohyama (born 1976), Japanese singer and actress
  • Arthur Henrique Ricciardi Oyama, or simply Arthur Henrique (born 1987), Brazilian footballer
  • Erica Oyama (born 1981), American television writer
  • Harue Oyama McVay (born 1928), American ceramist
  • Heiichiro Ohyama (大山 平一郎, born 1947), Japanese conductor and violinist
  • Ōyama Iwao (Japanese: 大山 巌), Japanese field marshal
  • Ikuo Oyama (大山 郁夫, 1880–1955), Japanese academic and politician
  • Judi Oyama, American skateboarder
  • Kana Oyama (born 1984) (Japanese: 大山 加奈), Japanese volleyball player
  • Katsura Ōyama (大山 桂, 1917–1995), Japanese paleontologist and zoologist
  • Keiji Oyama (小山 桂, born 1980), Japanese former baseball player
  • Keisuke Oyama (大山 啓輔, born 1995), Japanese footballer
  • Kyohei Oyama (大山 恭平, born 1989), Japanese footballer
  • Kyosuke Oyama (小山 恭輔, born 1987), Japanese swimmer
  • Luís Oyama (born 1997), Brazilian footballer
  • Mana Ohyama (大山 真奈, born 1992), Japanese handball player
  • Mary Oyama Mittwer (1907–1994), American journalist
  • Mas Oyama (Japanese: 大山 倍達), Zainichi Korean karate master
  • Motoi Oyama (尾山 基, born 1951), Japanese businessman
  • Miki Oyama (大山 未希, born 1985), Japanese volleyball player
  • Mikio Oyama (大山 三喜雄, born 1955), Japanese speed skater
  • Musashi Oyama (大山 武蔵, born 1998), Japanese footballer
  • Naohiro Oyama (大山 直大, born 1974), Japanese footballer
  • Nina Oyama (born 1993), Australian comedian
  • Nobuyo Ōyama (大山 のぶ代, born 1933), Japanese actress
  • Reiji Oyama (尾山 令仁, 1927–2023), Japanese pastor
  • Ruan Ohyama (大山 琉杏, born 2003), Japanese singer known professionally as Ruann
  • Shigeru Oyama (大山 茂, 1936–2016), Japanese karateka
  • Shigetaka Oyama (大山 重隆, born 1981), Japanese sports shooter
  • Shiho Oyama (大山 志保, Ōyama Shiho, born 25 May 1977), Japanese golfer
  • Shuka Oyama (小山 修加, born 1980), Japanese volleyball player
  • Shungo Oyama (Japanese: 大山 峻護), Japanese mixed martial artist
  • Shunsuke Oyama (大山 俊輔, born 1986), Japanese former footballer
  • Susan Oyama (born 1943), American psychologist and philosopher
  • Oyama Susumu (born 1952), Japanese sumo wrestler
  • Ōyama Sutematsu (大山 捨松, 1860–1919), first Japanese woman to receive a college degree
  • Tadanari Ōyama (大山 忠成, Ōyama Tadanari), Japanese former footballer, more well-known as Tadanari Lee (李 忠成, born 1985)
  • Taeko Oyama (大山 妙子, born 1974), Japanese basketball player
  • Takanori Ōyama (大山 鎬則, born 1974), Japanese voice actor
  • Takao Ōyama [ja] (大山 高男, 1944–2019), Japanese voice actor
  • Takashi Ohyama (大山 喬史), Japanese dentist
  • Takashi Ohyama, Japanese dentist
  • Oyama Tomomasa (小山 朝政, 1155–1238), Japanese samurai
  • Tsunamasa Ōyama (大山 綱昌, 1853-1934), Japanese politician
  • Yasuharu Ōyama (Japanese: 大山 康晴), Japanese shogi player
  • Yoshimatsu Oyama (大山 義松), Japanese footballer
  • Yūsuke Ōyama (大山 悠輔, born 1994), Japanese baseball player
  • Zac Oyama (born 1987), a CollegeHumor cast member

Fictional characters

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  • Gorou Ohyama (大山 吾郎) and Haruka Ohyama (大山 春夏), characters from the manga series Mix
  • Kota Oyama (大山 こうた), a character from the manga series Please Go Home, Miss Akutsu!
  • Mahiro Oyama (緒山 真尋/まひろ) and Mihari Oyama (緒山 みはり), characters from the manga series Onimai: I'm Now Your Sister!
  • Naojiro Oyama (大山 直次郎), a character from the manga series Shutendoji
  • Takeru Ooyama (大山 タケル), a character from the manga series Maken-ki!
  • Tochirō Ōyama (大山 トチロー), a character from the Space Pirate Captain Harlock series

See also

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  • 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