As alluded to in this video, Krispy Kreme is not the best place to get foreign donuts in Japan. That honor goes to Doughnut Plant. One of their cream-filled gourmet doughnuts will carve nearly 500 yen out of your wallet, add several hundred calories to your waistline, and soak the inside of your arteries with fried sugary goodness.
Their current seasonal offering is 和ドーナツ, starring this 抹茶あんドーナツ:
It wasn’t as good as the Pumpkin Cream one I had last fall. I would go for the Vanilla and Green Tea Cream if I was going to order again. Fortunately there is a Doughnut Plant inside Shinagawa Station, which is dangerously close to where I live. These are only on sale until the 15th and can also be found at Dean and Deluca.
(I spent a few minutes wondering why どなつ only 変換s to 度夏. The moral of the story? Know your long vowel markings in katakana.)