Ramen Zundoya Shinjuku Kabukicho is a 24-hour ramen shop in Kabukicho, Shinjuku, serving tonkotsu ramen and spicy ramen. Customers choose noodle thickness, doneness, and broth richness. You buy a meal ticket at the kiosk at the entrance before entering, and the wait was about 15 minutes on a weekend evening. Cards are not accepted.