I know these Orange flavoured M&Ms aren't new world-wide, but the woman working at the convenience store where I bought these said they were new here in Japan. As soon as I opened the bag I could smell the orange! The taste wasn't as over-powering as I thought it would be.
Setsubun inspired Kit Kats. The woman where I bought these said is is Azuki (red bean) flavoured Kit Kats. There is another post about these over at Japanese Snack Review. I haven't personally tried it yet. I think I bought this last year, or maybe a few years ago too.
I've been looking to see if they'll release Olympic Kit Kats. I bought some back in 2006.
Raspberry and Passion Fruit Kit Kats. These were previously released with Nescafe back in November of 2008.