The Hongan Shozu was constructed to use as a drinking water source of the castle town of Ono Castle in Warring States Period. The Hongan Shozu has been designated as a national natural treasure as the habitat of three-spined stickleback, which is cold-water fish. You can enjoy learning about biology and environment of creatures including three-spined stickleback. You can watch directly the three-spined stickleback swimming in the observation corner of the Hongan Shozu Itoyo-no-Sato Museum.
The Hongan Shozu
The appearance of the Itoyo-no-Sato Museum
Inside ot the Itoyo-no-Sato Museum
The three-spined stickleback swimming in the Hongan Shozu