Sushi Sanghyeon in Seoul serves a sushi omakase that pairs tsumami and sushi. The lunch omakase includes uni three or more times, and the course runs at roughly a five-to-five ratio of tsumami to sushi. The small room seats six, corkage for one bottle is free, and the chef remembers what guests say and applies it to later courses. Noise from the next table carries in the tight space, and seats by the window are drafty in winter.