Visiting Tokyo

Hi all,
I am currently in Tokyo for a business trip and will also come back several time during Protected content . I look for hints in Tokyo :
- a good restaurant to eat (my hotel is in Ikebukuro)
- where to go out
- which museum
- what to visit in the WE
- a theater art to see etc.

Also, if someone is interested this WE ( Protected content ) to make a cultural exchange between showing me Tokyo, and I can share my language skills (French, English,German) as my knowledge of cities like Paris, Stuttgart, Chicago.

Feel free to contact me, I would love to get insider tips :)
Emilie