Mister Donut Shinjuku Yasukuni Dori

Misdo in the heart of Shinjuku

This Mister Donut store is much like any other in terms of the menu offerings it has, but it does have the benefit of being right in the heart of one of Tokyo's biggest touristy areas. It's right on a corner so it's easy to spot, and there's a decent amount of seating including some counter-style seats right by the window -- those ones are fun to sit and people-watch at!