Asakusa area is quite famous tourist spot for both Japanese and foreigners. Asakusa area still has traditional aspects of Japan strongly. You could enjoy classic atmosphere of Japan. There are a remarkable temple called Sensō-ji and a well-known shopping street called Nakamise street.
Also, there are excellent restaurants especially for Japanese soba and a bowl of rice topped with tempura.
2:Drink Japanese Sake.
Please don't miss to taste the excellent sake. In tokyo, there are good sake tasting bars and you could enjoy the finest sake difficult to experience outside of Japan. Especially, the sakes named "Juyondai", "Dassai" and "Hakkaisan" are magnificent taste.
3:Look Tokyo National Museum
Tokyo National Museum is the largest art museum in Japan. You could look ancient Japanese art including Japanese swords. The samurai swords are historically famous and truly beautiful.