Nintendo is expanding its customer base with the widely appealing Wii. The DS hand-held has sold exceptionally well in Japan, although other markets remain uncertain. So based on Wii sales and, more importantly, game sales, the NTDOY.PK should sell for around $63.
The BOJ is widely expected to raise rates when it meets on August 22-23rd, so downward pressure on the stock may persist for a couple of weeks. Nevertheless, I think that it's a buy at $55 and lower.