I'm not sure about in Japan, but the Arcade 360 was released for a time with a compilation disc that had the Pac-Man CE and a few other throwaway casual games, the sort that my wife plays for free on Facebook and I'm always yelling at her because of the horrible sounds. Anyways, the disc now turns up for $5 at Gamestop and the other gaming pawn shops, which is a sweet buy as the download is 800 XBLA points, and this means I actually have a hard copy.
Ah, here we go, looks like they did the same thing: http://page10.auctions.yahoo.co.jp/jp/auction/m67325464
Anyways, it's a blast if the original Pac-Man has ever even remotely interested you. The game is timed in either 5 or 10 minute sections depending on the mode, so it's a score attack the whole way through. There's an XBLA demo that gives you a good feel for the title.