Yayoiken Shinjuku Hyakunincho is a Japanese chain restaurant near Shin-Okubo that serves set meals such as pork ginger saute and tonkatsu. It also offers grilled mackerel and sukiyaki set meals, and rice is self-served with unlimited refills. Many customers come for breakfast, and food generally arrives quickly after ordering. The sukiyaki set meal is sweet and salty, suited to Korean tastes.