Aikido is a modern martial art founded by Morihei Ueshiba in the 1920’s. Hombu Dojo in Tokyo is said to be the center of the Aikido world. Hombu offers regular classes throughout the week as well as an intensive Aikido Academy lasting five months.
If you have any interest in Aikido at all, you should make it a point to stop by Hombu Dojo during your next trip to Tokyo.