Lazy traveler 2 days in june

I hate to travel, but gf want me to come with her to Tokyo..

She's gonna leave me for 2-3 days for some work activity jumping cities,..

Questions:
1. so any ideas what a 36 yo doing in Tokyo for 2-3 days?
2. anything fun? anything good to see, eat, watch?
3. and how much money should I bring?

Thanks
bob

There's a lot of options depending on what you like to do. I recommend checking out the pages on this article for ideas:

http://www.japan-guide.com/e/e2164.html

Once you have a few things you'd like to see, post again with a more detailed itinerary, and we can help with logistics/advice.

Do tell us your interest?

Architecture? Landscape? Sceneries?
Any food prefence?
Any music preference?
Any fashion prefence?

When I was there in January I ate in a variety of restaurants, some fancy and some casual, so my costs per day fluctuated. I had a city rail pass (Pasmo) and visited a few museums, bought a few souvenirs. 10000 Y (roughly $100 USD) covered it easily, if I recall correctly.

If you ate just one meal in a fancy restaurant it would cost more than your Y10,000. :)