if you want to play japanese games on you US ps2, and dont want to mess with chips and void any kind of warrenty or possibly ruin you ps2, get a boot disk. places sell them, mut you can download the software from a mIRC sever or some other file sharing programlike kazaa or morpheus. then burn the stuff on a regular cd-r, and put it in your ps2, wait a minute and it will tell you to put in the Japanese game and thats it.