If you're looking to witness sumo practice, known as “keiko,” in Tokyo, you're in luck. One of the best places to catch a glimpse of this ancient tradition is at a sumo stable, also called a “heya.” These stables are the training grounds where sumo wrestlers live and train together under the guidance of their stablemaster. While some stables might not allow public access, there are a few stables in Tokyo that welcome visitors. One notable stable is the famous Arashio-beya, located in the Ryogoku neighbourhood, which is known as the heartland of sumo. At Arashio-beya, you can observe the wrestlers' intense training sessions and get a firsthand look at their rigorous routines. Another option is the Kokugikan Sumo Stadium in Ryogoku, where you can catch morning training sessions during specific periods throughout the year. Keep in mind that it's always a good idea to check the schedule in advance, as the practice times and availability for visitors can vary.