According to a Fact Sheet seen on Konami Japan's website, the PSP versions of Suikoden I & II seem to be staying in Japan.

A response from Konami Digital Entertainment - America was unavailable at the time this news was posted. This may be an error, as the PSP version of Winning Eleven 9 is also slated only for Japanese release on this fact sheet, when the franchise is already heading stateside. We'll keep you updated on this unfortunate news.