Other Japanese Pitchers

There are others besides Matsuzaka. Koji Uehara will be a free agent after next season (which will unfortunately make him 33 for the 2008 season), and is an ex-teammate of Hideki Matsui from his Yomiuri Giants days.
Uehara stats
Video one
Max. MPH

Hiroki Kuroda (possibly next year)
stats
Video one, two, three
Max. MPH 93

Kazumi Saitoh (possibly next year)
stats
Video one, two, three, four
Max. MPH 94

Kei Igawa was posted (or is about to be), and the Yanks supposedly put in a bid, but they only expect a back of the rotation starter.
Stats - video one, two, three
Max. MPH 92