The Tokyo Marathon begun in 2007 through the integration of the Tokyo International Marathon and Tokyo City Road Race. A total of 30,000 runners join in this marathon, which is the largest citizen participation marathon in Asia. It also plays a role as a selection race for participation in international games including the Olympics.
The race is separated into a full-marathon leg and a 10-km leg, both of which start from the Metropolitan Government Building in Nishi-Shinjuku, Tokyo. After passing Iidabashi and in front of the Imperial Palace, the 10-km group finishes at Hibiya Park. The full-marathon group continues running, and they pass noted sightseeing locations such as Ginza, Nihonbashi, Asakusa-Kaminarimon, Tsukiji and Toyosu, running towards Tokyo Big Site at the new Tokyo Waterfront Subcenter to finish.
Middle of February every year.