Power Support Japan has introduced several new accessories for the iPod nano (with video). The Crystal Jacket Set (Translated link) is a hard plastic case, offering two-piece snap-together construction, access to all ports and controls, a place to attach the included strap, and included film protectors. It sells for the equivalent of $19. The Silicone Jacket Set for iPod nano comes in both rounded and square versions, and in clear or black, or clear…