[Nagoyankee]

With the weather like this, you may not feel like going too far away. If it clears up soon, Takao-zan would be great.

If not, have you tried beer and yakitori at Omoide-Yokocho, the two-foot-wide alley just south of the Shinjuku station?

Tokyo Dome City is good for all the rides and/or natural hot springs. The Giants have games (baseball) at Tokyo Dome today thru 10th as well.

If you're into the otaku culture, Nakano Broadway is only one train stop away on the express.

You can also walk north to Okubo Street for the best Korean restaurants in Japan.