Originally Posted by lobsterdog

If you want to eat sushi on your first night, Sushi Ten serves dinner until 2am, and is inside the bustling, 21-hour-a-day NeWoman food hall very close to your hotel. Prix-fixe menus are 7000 yen.

Toriyoshi, about five minutes away, is open until 4am, and they serve fantastic chicken wings along with yakitori and good side dishes. Watami is a lively izakaya and it's another late-night option on that side of the station.

There's plenty to see and do in Shinjuku the next day even if it rains - you can compare several different department-store food halls like Takashimaya and Isetan, and check out the new Samurai Museum.