Aint It Cool News have run a story from one of their readers, reporting that Tom Cruise has appeared on Japanese television and revealed plans for the 4th Mission: Impossible film. See above, images from said show.
As I learned from ‘supastring’, the AICN scooper, Cruise was a guest on SMAPxSMAP. According to Wikipedia, the show is hosted by the Idol group SMAP – presumably an aging Idol group as the show has apparently been on air for around 13 years (take that Take That). I’d guess that Cruise would have appeared in the first part of the show, Bistro Smap, in which a celebrity guest is served food and interviewed. So, basically, a boy band gave Cruise a snack and he chatted a while, spilled some beans on his big spy franchise.