01 / Kaikōsha
A social hall for army officersis now a National Cultural Property.

The Imperial Japanese Army's 11th Division was established in Zentsuji in 1898, with Nogi Maresuke (乃木希典) as its first commander. In 1903 the Kaikōsha (偕行社), a social hall for its officers, was built. It became a National Important Cultural Property in 2001 and reopened to the public in 2008 after restoration.
- 1903: Kaikōsha built
- 2001: National Important Cultural Property
- First division commander: Nogi Maresuke, from 1898
