Sushi Doku The Seongsu is a Japanese restaurant near Ttukseom Station and Seoul Forest that serves sushi, eel rice bowls, and beef sukiyaki. Its signature items are live sushi pressed to order, salmon cured with 2.5 times the usual kombu, and hitsumabushi with half eel and half egg. Adding the restaurant on KakaoTalk as a plus friend enters you in a draw, and takeout and delivery are available. The restaurant fills up before lunch and a wait forms, so a reservation is required.