Drink: Streamer Coffee Company
The lattes are just as impressive as the architecture at the Harajuku location of @streamercoffeecompany, which is housed in a three-story stack of shipping containers. Check out their Insta for photos of founder Hiroshi Sawada's championship-winning (literally) latte art.

Also Noted:
@fuglentokyo, run by Norwegian expats in Yoyogi.
The Roastery, serves a Japanese take on the cronut in Jingumae.