Sosu-in is a Japanese-style pub in a quiet alley in Seomyeon, Busan, serving small dishes and sake. It offers mackerel pressed sushi, golden threadfin bream rice cooked in a pot, and mochi ice cream in portions for one or two people, so diners can try several items. Reservations are required, and the format of ordering several small plates to share suits the space. Seats and the counter are narrow, so it feels like squeezing in.