Phantasy Star Portable won’t be out until July 31st in Japan but Sega confirms there will be a demo for the game in two weeks time (July 14th), most likely through the Japan PSP Browser page. Players can get a taste of both the Story and Multi Mode, where they can enjoy local co-op play with up to four friends. Also, character created in the demo can be brought over to the full game. More screens from the demo after jump.
Update: The demo will allows you to play the whole of the first chapter, five missions in the Multi mode and it will be 301Mb in size, more info here.