While you que in line to buy the chocolates, there is a display of the "history" of Kit Kat bars, lol.
Each box is quite pricey sold at 400 yen in which you get 4 small packages with 8 waffles of kit kats. I think the sleek packaging perhaps makes the price a little expensive than the ones sold at the convenience stores. But to be honest, I think the ones sold at the convenience stores would be much more worth it as you get more Kit Kats for almost the same price. These would make a great souvenir though as they are nicely packed in a box.
There is also a special flavour with ice cream of grilled pudding Kit Kats served with "premium" soft ice cream but only limited to 300 for 600 yen each and you would have to go to the store and line up super early to get them as they only sell a limited quantity a day to the very first customers. Sadly, my friend and I were not there early enough to try it. =(
The entrance to Seibu connected from Ikebukuro station.
Random snaps of cute desserts, cakes, macarons, tea and biscuits. Ah, I wish could eat and buy all of them!
This is what the Seibu department mall looks like from the outside. The whole entire basement lower floor is full of food stands with many Japanese sweets that would be a great place to shop for souvenirs!
How to get to the Kit Kat Chocolatory Store: The store is in the basement of the south side at B2 level and it is all the way at the back corner of Seibu's basement.
I've also recorded a video of the store on my phone and you can watch it here on my instagram.