The Tokyo Marathon, first held in 2007, has become one of the most popular marathons in the world, with over 30,000 runners participating each year.
The Tokyo 2020 Olympic Games, originally scheduled for 2020 but postponed due to the COVID-19 pandemic, are set to take place in 2021.
Japan has a trend called "forest bathing" where people go into the woods to de-stress and improve their health.