In addition to Yahoo! Japan broadcasting all Pacific League games online, all Yokohama BayStars home games at Yokohama Stadium have also become available online starting this season. The PL games are IP restricted, so you need to work around that if you live outside of Japan (myp2p.eu is one option), I’m not sure about the BayStars home games.
EDIT: The BayStars online service seems to only provide video by half-inning (which is a pain) and appears to be tape delayed by 20 minutes at least. Then again, if you avoid Japanese sports news, then this might as well be live on gameday.
Japan, Hockey, Baseball, etc. 