Sozai Japanese Restaurant (Izakaya Ramen) is a Japanese izakaya in Manhattan that serves tonkotsu ramen and tonkatsu. The menu also includes katsu curry, katsudon, crab croquettes, karaage, sake, and Asahi draft beer. The tonkotsu ramen suits eating the day after drinking, and the tonkatsu is thick with rice that is also good. Portion sizes are small.