The National Archives of Japan will hold a special exhibition titled "Wasshoi! Tenka Festival - Enjoying Edo Castle and the Sanno Festival Visually" from June 9 to June 20, 2026. The exhibition will feature colored maps, historical prints, and rare documents like the Tokugawa shogunate's official history "Gojikki" and the Meiji government's "Kobunroku," designated as a National Important Cultural Property. Admission is free, and the event aims to highlight the grandeur of the Sanno Festival, closely tied to the Tokugawa family.