The Raffine Imperial Palace 20km Run is a morning group run in central Tokyo, starting at 8:00 AM from the Otemachi One location. It is aimed at beginner to intermediate runners, so the setup is closer to a supported training run than a formal race-day spectacle.
The route goes around the Imperial Palace, a popular running loop beside Otemachi and the palace grounds. Runners choose from pace groups at 5:00, 5:20, 5:40, or 6:00 per kilometer, which makes the 20km distance easier to manage with others at the same speed. Entry is listed at ¥1,500.