Nintendo once again isn't taking part in the autumn Tokyo Game Show. Not to say there won't be Nintendo games there....
According to Core Magazine, Nintendo will once again step out of the autumn Tokyo Game Show. This year's autumn TGS will take place October 12-14 at the Makuhari Messe.
This doesn't mean there won't be any Nintendo games shown there. Companies that are already chalked up for the event are From Software, Enix, Capcom, Namco, Sega, and Square.
Nintendo was present at this year's Spring TGS for the first time in many years. They debuted GBA Music (which is still unreleased) and promoted the handheld in general, as it had just recently hit stores in Japan.