Just kidding... It's not Shinkansen flavor but a special Nozumi Shinkansen edition of Kit Kat that comes in a box shaped like the famed Osaka to Tokyo Shinkansen. Inside the box is a bunch of the regular petit Kit Kat but with Shinakensen trivia on it plus some stickers. I picked this up at that Nagoya Shineansen waiting area for my son...yeah, my son. :)
One of my other favorite things to do when going to Japan is visiting Conbini (convenient) stores like Family Mart, 7-11, Lawsons, etc and checking out the Kit Kat section. Did you know Kit Kat world wide except for United States is made by Nestle, not Hershey? Not sure why that is. What I've discovered though is there are tons of special Kit Kat flavors in Japan. It changes seasonally. Today, I'm covering one I just found called, *CHEESE*! It's not just any cheese though, its European cheese! (American Cheese Kit Kat sounds even more disgusting--I hope it doesn't exist.) Being in Japan, I'll try anything once so I bought this.
Wikipedia Entry Here. It is very popular in Japan. I had never heard of it before. In Japan it is pronounced Mom-bu-lan (at least it sounds like it to me). Not sure if that is the correct pronunciation as it is French. My wife loves it; I think it is okay. Anyway, saw that Pepsi has a Mont Blanc flavor here in Japan. I got it and tried it. Kind of like cream soda. Was alright. Haven't seen any different Coke or Pepsi Japanese products ever since my journeys to Japan began so I thought this was significant.