You need to find the WADs for OoT JP and MM JP and install them. Did you buy MM and OoT that you currently have? If not, the steps should be the same. Browse these forums a bit, this question has been asked 1000 times:
http://forums.zeldaspeedruns.com/index.php?topic=1271.0As for WW, SS and TP. You will need to find the original games. Playing from copied discs/via usb is not allowed for speedrunning due to different loading times. If you just want to practice, try to google on the japanese games and you might find them. It is not allowed to link them here.