I like Suntory Hall in Roppongi!
The main hall made of oak is very beautiful and makes the sound very warm. I enjoyed the orchestra concert in the main hall and the chamber music in the small hall.
Also the hall is very famous for the pipe organ which is one of the largest in the world!
Every Saturday a market is held in front of the building so you can enjoy the foods and crafts. I bought some honey and fresh vegetables there :)