Kyoto Prefecture's Old Main Building (completed 20 December 1904; Important Cultural Property) is described by the prefecture as the oldest government office building in Japan still in use, and its ceremonial hall, former governor's office and former assembly chamber are open to the public for free.
Why it's unique
The prefecture describes this as the oldest government office building in Japan still in use. That is the prefecture's own claim; independent sources confirm the building and its dates but not the superlative, so confidence is lowered.
What makes the visit is that it is still working: you pass staff in the corridors on weekdays and walk into the former governor's office, which keeps its old desk and fireplace.
Before you go
It is still a working office: you pass staff in the corridors on weekdays. The former governor's office keeps its old desk and fireplace; the assembly chamber and ceremonial hall close without notice when in use for meetings or wedding shoots, so check.
Late March to April the courtyard's cherries (including the "Katamori-zakura", named for Matsudaira Katamori) bloom without the temple crowds. salon de 1904, run by Maeda Coffee, is inside (last orders 16:30).
Free. Tuesday to Friday plus the 1st, 3rd and 5th Saturdays, 10:00 to 17:00; closed holidays and New Year. The ceremonial hall closes after 16:00 on 20 October 2026; the autumn Kanseisai event runs 24 October to 3 November 2026.
