Image from Nestle Japan's web site.
You may wonder why they're showing ice cream on the front of the package when this is a cheesecake flavor. In honor of the changing of the season from wet, humid, and uncomfortably warm to unbearably hot, humid, and somewhat less wet, they are advocating that you freeze the bars to give you a more pleasant experience. If you'd like to pick up a bag, they're retailing for 500 yen (about $5), but it's likely that you can get them for around 350 yen at most markets or discount snack shops.
My guess is these will taste pretty much like the strawberry cheesecake KitKats. I'll pass, thank you.