The 5-kilometer path that circles the Imperial Palace at the heart of Tokyo is one of Japan’s most famous running routes. Although beautiful throughout the year, I personally recommend an early morning run in autumn. The temperature is just right to keep you cool while offering stunning foliage views lit by the slowly rising sun.
Learn more about this running route: https://shorturl.at/gZqxg
Imperial Palace (Google Maps): https://maps.app.goo.gl/yxVQNfH1XLngCny8A