I can find these 3 files:
BLJS10258_A0101_341-355-421+_OPOISSO893.7z
BLJS10258_Retail-Fix_341-355-421+_OPOISSO893.7z
J-Star_Update_1.01.pkg
I installed them all but still same error!!! Is there an specific order I must install those 3 files, or it doesn't matter? The second is not a pkg file. It's just some files that you replace them with the original ones from the game. (PARAM.SFO and USRDIR/EBOOT.BIN). I replaced those as well.
I will try installing them in different order. I will try also the game without replacing the files from the second patch. Coz before replacing those (after installing the 3rd pkg patch), they game wasn't showing the error but it was reloading to the main PS3 screen instead of entering the game. This happed also with other games I had but when I changed them to DBMirror then the worked. I will change that game too to DBMirror and try again.
Read more: http://www.ps3news.com/forums/ps3-help-support/ps3-japanese-game-error-help-129795.html#ixzz38HzgcEzw