Sushi Yonz is a Japanese restaurant near COEX in Samseong-dong, Seoul, serving sushi courses centered on lunch omakase. The course focuses on sashimi and sushi, with neta including tuna, blue-backed fish, and uni. The lunch omakase runs from sushi through dessert in a quiet setting. The shari and the seasoning brushed on the sushi are on the strong side overall.