390 of which were only released in Japan.

The xbox actually had ~900 games and the GameCube had ~700.

http://en.wikipedia.org/wiki/List_of_Dreamcast_games

http://en.wikipedia.org/wiki/List_of_Nintendo_GameCube_games

http://en.wikipedia.org/wiki/List_of_Xbox_games

Wikipedia lists 967 games for the xbox alone. The Gamecube appears to have come in somewhere around 500 or so. But it's probably worth noting that no one ever claimed either of those consoles had massive libraries, either.