Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asian mainland, it is bordered to the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea in the south. The Japanese archipelago consists of four major islands alongside 14,121 smaller islands. Japan is divided into 47 administrative prefectures and eight traditional regions, and around 75% of its terrain is mountainous and heavily forested, concentrating its agriculture and highly urbanized population along its eastern coastal plains. With a population of almost 123 million as of 2026, it is the world's 11th most populous country. Tokyo is the country's capital and largest city.
Local runners can also target 1 discoverable race/event pages linked below when planning training blocks.
| Season | Typical weather | Running guidance |
|---|---|---|
| All seasons | Varies by location | Choose time slots with lower traffic and better weather. |
Surface mix: Mostly urban roads and mixed city surfaces.
Safety tip: Check route details and local traffic conditions before running GPS art routes.
Marathons and races
Popular runner events