History - TOKYO got devastated repeatedly but restored every time
If you are a history lover, you cannot miss the Imperial Palace, which was once called Edo castle where Shogun was living. The peaceful handover of the castle from the last Shogun to the emperor in 1868 was one of the most important moments in Japan's history.
Now many visitors visited only to Double-Bridge at the Imperial Palace, but it is not enough. To learn the history, please go to East Garden (open to public 5 days a week, the entrance fee is free of charge), then walk up to the remains of the Edo castle tower. The tower was the highest at a time of construction in the 17th century, but it was burned down by fire only 20 years later. Since then, the castle tower has not been reconstructed as it is useless in a peaceful time.
To learn the history of Japan and Tokyo deeply, there are two recommendable places to visit. One is the Tokyo National Museum in Ueno. It is the oldest and largest museum in Japan, and its exhibition provides an overview of Japanese history and culture chronologically. Ueno area has a lot of museums. It is heaven for art-lovers!
The other recommendation is the Edo-Tokyo Museum in Ryogoku. This museum focus on the history of Edo and Tokyo. Once you walk in, a lot of exquisite exhibits take you to the old days of Tokyo. This museum is just next to Kokugikan, a National Sumo Stadium. There held Sumo tournament there in January, May, and September, and you may have a chance to see Sumo wrestlers on the street.