The expensive, but coolest, way of solving this problem would be to get one of the PCE Flash Cards by Neo that hold 64megabits. You can fire all your games onto that card and play them on your Jap machine. Not only that, if you have the right ROMS, you can play the US versions through the flash card too, effectively making your little white PC Engine a multi-region console without any modification. Trouble is, it costs $109. At least there are no postage and packaging costs on top. I think it's definitely worth it, and it saves a lot of space too.