01 / Office building
On the plan, three buildings joined by corridors.The Sankokan entrance is close to that entrance block.

Kumihama Prefecture was set up in 1868 (Meiji 1) and abolished in 1871. According to the ridge-tablet inscription, the new office was completed in May 1870, and part of it was moved to its present site in 1923. The area around the Sankokan's entrance roughly matches part of the outer walls of the entrance block.
- New office completed May 1870 (ridge-tablet inscription)
- Moved in 1923
- Kyoto Prefecture designated, 1985

