Yeah being in japan right now i can definatley say there is a lot of skill involved. Also asking the clerk in broken japanese to make it easier helps too lol. Won lots of cool stuffed animals and a famicon clone for only 1500 yen which i think is pretty damn good. Ive see some japanese people pump over 2000 yen just to get one of the prizes i won lol. UFO catchers which are differnt than american claw machines are so addicting, notice only two prongs instead of three, makes the game entirely differnt. You just have to look for the "winnable" prze, an arcade peon wil quickly reset the prize after you win also.
cheers,
Mike