The race started in front of the Tokyo Metropolitan Government building in Shinjuku. The course included well-known Tokyo districts such as Asakusa and Ginza.
Organizers increased security this year by introducing electric bikes equipped with surveillance cameras.
They said they also increased both the number of security cameras and barriers to prevent vehicles from disrupting the marathon. Officials said they want to utilize these security measures in the 2020 Tokyo Olympics and Paralympics.
The winner was Ethiopia’s Birhanu Legese, with a time of 2 hours, 4 minutes and 48 seconds.