Ishiyama is a Japanese surname. Notable people with the surname include: George Ishiyama, Japanese-American businessman John Ishiyama, political scientist Masumi Ishiyama (born 1981), Japanese cricketer Fictional characters: Yumi Ishiyama, main character from the French animated TV series Code Lyoko and Code Lyoko: Evolution. Principal Ishiyama, secondary character from Danny Phantom See also Ishiyama Hongan-ji, a Japanese building Japanese-language surnames