During the Tokyo Game Show this year, we asked some of Japan's biggest game industry figures what they felt is the most important game to them (outside of games they've actually created). For Keiji Inafune, creator of the Mega Man series and the brainnnnnz behind the upcoming zombie action game, Yaiba: Ninja Gaiden Z, that fundamental game is The Legend of Zelda: A Link to the Past for the Super Nintendo. As important games go, we'd agree that Link to the Past is definitely on the list (and handily available on Virtual Console).
Meanwhile, Hiroshi Kawano, president of Sony Computer Entertainment Japan, picked Crash Bandicoot, which was conveniently (perhaps too conveniently) just released as a PSOne Classic for the PlayStation Vita. While it may not be the game many would have picked, it certainly has a memorable spot in PlayStation history, especially considering its developer, Naughty Dog, went on to create the phenomenal Uncharted series.
Sony PlayStation 3 (late 2012)
Nintendo Wii console