It is a nature park located in Tsukigata Town. Inside the park, there is an observation deck from which you can get a panoramic view of Tsukigata Town, and "Japan's Northernmost Cedar Forest" which was planted by prisoners of Kabato Prison in Meiji 23.
In addition, there are monuments to successive prison wardens and the former site of the Horonobe Road excavation benchmark.
In spring, cherry blossoms, and in autumn, autumn leaves color the inside of the park.

○ Maruyama Park's Cedar Forest .
It was planted by the hands of prisoners as a commemorative tree planting for the 10th anniversary of the opening of Kabato Prison in Meiji 23, with approximately 600 trees.
It is said that the prisoners, out of homesickness, maintained them without begrudging the labor.
As planted cedar trees, it is Japan's northernmost limit, and it has been designated as a protected forest for plant communities.