
Guida
Oshitoishi no Oka is a hilly landscape located at an altitude of 845 meters in Minamioguni Town, Aso District, Kumamoto Prefecture. This site is dotted with various sizes of stones known as "Oshito no Ishi." Most notably, a pyramid-shaped megalith standing 5.5 meters tall and 15.3 meters in circumference exists here. Due to its shape and arrangement, it is theorially estimated to be an ancient site. The landscape is a beautiful place where the natural environment and stone formations that suggest intentional human placement coexist.
Local legends tell of ogres (oni) using these stones for play during the night. Furthermore, the large rocks feature petroglyphs (rock carvings) that some believe are related to Sumerian script from approximately 4,000 years ago, drawing significant archaeological attention. Because the arrangement of the stones is thought to be artificial, the area remains a place filled with historical mysteries, preserving traces of ancient civilizations and cultures.

The site features various stone formations of different shapes. The central attraction is the pyramid-shaped megalith, which stands out due to its massive scale and unique geometry. Additionally, the petroglyphs carved into the rock surfaces provide a unique cultural element to the site. These elements create a space where natural formations and historical enigmas merge seamlessly.
While the natural scenery is beautiful in every season, the landscape changes depending on the time of year due to its location within the Aso natural environment. The site is accessible 24 hours a day. During daylight hours, visitors can clearly observe the shapes of the stone groups, the carvings on the rocks, and the surrounding topography. The changing atmosphere during early morning or evening also adds a unique character to the location.

Visitors can enjoy walking through the vast hilly terrain and experiencing the mysteries of history firsthand. Activities include observing the arrangement of the megaliths, examining the ancient carvings, and enjoying a quiet stay surrounded by the nature of Aso. Exploring the distribution and shapes of the stones allows for deeper contemplation of ancient history.
The area around Minamioguni Town in Aso District features many scenic spots overlooking the Aso Outer Rim and the caldera. The region also features nearby hot spring resorts, making it a perfect destination to enjoy both nature and Japanese culture.
The site consists of natural terrain with some sloped areas. It is highly recommended to wear stable, comfortable walking shoes for movement. Regarding payment, specific information regarding fees for facility use was not provided in the source. For English language support, it is recommended to check official websites in advance. No prior reservation is required for visiting the site. Please be mindful of the natural environment and help protect the stone formations.