Tokyo Marathon 2010 Posted on October 14, 2009 by paulmyer Reply “Congratulations! You have been selected to run the 2010 Tokyo Marathon.” So read the organizing committee’s October 13, 2009 e-mail! The Tokyo Marathon will be held on February 28, 2010. Fortunately the race falls during the UMaine spring break. Ten days in Japan will be a welcome venue for a winter vacation.