35°42′27″N 139°45′12″E / 35.7076186°N 139.7534024°E
The Kodokan Judo Institute (公益財団法人講道館), or Kōdōkan (講道館), is the headquarters of the worldwide judo community. The kōdōkan was founded in 1882 by Kanō Jigorō, the founder of judo, and is now an eight-story building in Tokyo.
Bunkyō (文京区, Bunkyō-ku) is a special ward in the Tokyo Metropolis in Japan. Situated in the middle of the ward area, Bunkyō is a residential and educational center. Beginning in the Meiji period, literati like Natsume Sōseki, as well as scholars and politicians have lived there. Bunkyō is home to the Tokyo Dome, Judo's Kōdōkan, and the University of Tokyo's Hongo Campus.
It was formed in 1947 as a merger of Hongo and Koishikawa wards following Tokyo City's transformation into Tokyo Metropolis. The modern Bunkyo ward exhibits contrasting Shitamachi and Yamanote geographical and cultural division. The Nezu and Sendagi neighborhoods in the ward's eastern corner are attached to the Shitamachi area in Ueno. On the other hand, the remaining areas of the ward typically represent Yamanote districts.
The rivalry between the Kodokan school of judo and the Totsuka school of Yoshin-ryu jujutsu happened in the 1880s during the Meiji Era in Japan. Consisting of several challenges and tournaments, its result saw the decline of the traditional jujutsu schools and the rise of judo as an institutionalized martial art. Although surrounded in controversy and legend because of inconsistent sources, it has been considered a vital part of the history of judo.