Special O Bok Susan One Sentinel Yeouido is a Japanese dining spot in Seoul that serves seasonal seafood dishes, sashimi, and uni preparations. It sits on the second floor of One Sentinel near Yeouido Station Exit 3. The menu includes assorted sashimi, uni, toro, ikura, scallop, and shrimp, along with honmaguro maki, nuruk-salt grilled pork jowl, and minari seafood jjamppongtang. The dining space is divided into rooms and a hall, and it is a newly opened Japanese dining spot in Yeouido.