Fort of swamp

It is a place that can be told as “fencing of a swamp” where Kiyohara Kazuho lost Genjie in the historically famous “Battle of the Three Years (Role)” that occurred at the end of the Heian period. A natural fortress that surrounded the surroundings, swamps, and refused to attack those who are swamps, rivers, and wetlands is just an impregnable Mizuki. The scale is said to be about 400 hectares, and the surrounding topography tells its history