I know that the US controllers and the Japanese controllers do not fit each other. From what I understand, you can find a converter so that you can use them on the other system. Is this true? Also if this is true, can you use the converter on the turbo tap and use all US controllers on a Japanese system? Reason I am asking is this. Local Craigslist offer for a TG6, turbo tap, 2 controllers, 9 games (Keith Courage, final lap twin, world class baseball, dungeon explorer, victory run, takin it to the hoop, tv sports football, alien crush, and power golf) and all cords to hook it up. Started the price about a month ago at 175, now down to 150. if they go lower, around 125 or so, it will be hard to not get and if I can use the controllers and tap on a japanese duo unit then I will be saving some money in the long run trying to find a tap and 2nd controller.