Arien is a small Japanese restaurant on the first floor of the Cheonggu Building at Eunhaeng Sageori in Junggye-dong, Seoul. Sushi is the main dish, and the restaurant also serves altang and hoedeopbap. The space holds up to 15 people, with two four-person tables and a counter that seats five. The room is narrow, so the tables sit close together, and a wait forms at lunchtime.