The 8TBJ10 Marathon is a series of eight races that are run annually in Tokyo, Japan. It is the largest road race series in the country and attracts hundreds of thousands of runners from all over the world. The 8TBJ10 races consist of four races of 10 km, three races of 10 miles, one half-marathon, and one mini-marathon. The races take place throughout the year with the main event being in the spring. The different courses include sections of the city's iconic Shinkansen bullet train line, and a scenic loop around Mount Fuji. The 8TBJ10 boasts a course designed to showcase some of Tokyo’s most iconic landmarks and neighborhoods, and is a celebration of the city’s vibrant culture. The 8TBJ10 is known for its unbeatable atmosphere, with supporters cheering runners on as they race through the streets of Tokyo, and runners coming in all shapes, sizes, and ages. It is one of the most exciting events to be found in Japan, and a must-do for any serious runner.