User blog:Neon Girl Sky/That's interesting

Ok, I once looked on the page for Sonic Rivals 2 and on the trivia page it said that both Sonic Rivals games never came to Japan. Seriously, what Sonic game never gets released in Japan? (I already know that both games were made in either Canada or the U.S (I can't say for sure)). So, does anyone know why the Sonic Rivals series was never released in Japan?