Mongolian Tanmen Nakamoto Shibuya is on basement floor 2 of Toho Cinemas Shibuya in Dogenzaka, Shibuya, Tokyo, and serves spicy ramen and tsukemen. The mokotanmen has a thick, mapo tofu-like broth with short, thick noodles. Spice levels run from 1 to 10, and the in-store system separates set orders from noodle-only orders. At higher levels the broth is salty, so you end up reaching for water.