The 234th UP RUN Imperial Palace Marathon is a paid morning running event in central Tokyo, with reception at the Imperial Palace Clock Tower in Kōkyogaien, Chiyoda. It is held on a June morning and proceeds in rain, with races scheduled between 08:30 and 12:00. Runners select from parent-child 5 km, solo 5 km, 10 km, 15 km, 20 km, or a 20 km relay, and timing is provided for those seeking an official measure of their run.
The course follows the Imperial Palace loop, a familiar running route in Tokyo, and the check-in point is a two-minute walk from Sakuradamon Station on the Tokyo Metro Yurakucho Line. UP RUN welcomes participants aiming for a record, runners assessing their training, first-timers, families, children, and seniors. The series is organized by the UP RUN Executive Committee, with fees dependent on the race category.