If you don’t have any plans for sightseeing in Tokyo, or have any problem about travel around Tokyo, how about visiting the tourist information center, which is named “Tokyo City i” ?
It has concierge desk which provide tourist information such as tourist sites, festivals and events, restaurants, and accommodation in and around Tokyo in four different languages (for free). It also has some computer facilities that will help you find tourist information (for free).
And many brochures for tourist sites are available (for free).
(I saw many tourist from different regions of the world at this center:) )
It is located in the basement of JP Tower, KITTE which is very near the Marunouchi South exit of Tokyo station. Even Japanese might find something new!