Hannah H.
Yelp
J. sweets offers Japanese confectionary sweets, candies, and cookies; they have a location inside Mitsuwa, right next to the bookstore.
Their displays are aesthetically pleasing and well-organized, and features items from Kobe Fugetsudo, Shiroi Koibito, Yoku Moku, Minamoto Kitchoan, Royce' Chocolate, Mochi Cream, and Yamari Matcha. They also have seasonal, limited items, and collectibles, too.
Staff could work on the service - when one stops by, it'd be nice to be acknowledged and asked if there should be any assistance offered. I understand that there may be some traffic flowing through, but it really makes you not want to purchase anything if you're not being helped.
They do online orders and ship across the States.
+has Royce' Chocolate and Minamoto Kitchoan items
+non-existent service
+located inside Mitsuwa, next to the Kinokuniya bookstore