Nothing says running in Tokyo like a run around the Imperial Palace. Perhaps Tokyo's most famous running trail, this course is enjoyable for all levels with 2.5-kilometer and 5-kilometer options. The area is mostly flat but the north side of the course is an uphill run for a few hundred meters. The sidewalks here are wide, allowing others to easily pass. Located near Tokyo's business and financial district, the trail is popular among those working in the nearby offices and gets crowded in the early mornings and during lunch hours.

https://livejapan.com/en/article-a0002405/

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