
Guide
Chojakahara Site
9 min readOverview & Highlights
The Chojakahara Site, located within Miyama Park in Itoigawa City, Niigata Prefecture, is one of the largest settlement ruins in the Hokuriku region, dating back to the Jomon period (approximately 5,500 to 4,000 years ago). This site served as a crucial hub for the production and distribution of stone tools, particularly stone axes and jadeite (jade), utilizing resources from the Hime River. Situated on a plateau about 90 meters above sea level and 2.5 km from the coast, the site provides vital archaeological evidence of how ancient people utilized the natural environment to build a sophisticated stone tool culture.
Historical & Cultural Background
The history of this site reaches back to the mid-Jomon period. The Hime River basin is globally renowned as a source of high-quality jadeite, and the Chojakahara Site was a key center for its trade. The processes of processing stone tools and jade ornaments for distribution across various regions form the foundation of the life lived here. The 'Chojakahara Site Park,' developed to preserve and showcase these findings, features reconstructed exhibits based on excavation results, offering a tangible look at the social structures and technological standards of the era.

Key Attractions
The Chojakahara Site and the Chojakahara Archaeological Museum offer the following features:
- *Permanent Exhibition Room 'The Buried Great Settlement of Chojakahara ~Home of Jadeite~'**: A journey through the history of Itoigawa, spanning from the Jomon period to the Edo period.
- *Reconstructed Dwellings**: Based on archaeological findings, visitors can see reconstructions of Pit Dwellings (No. 20 dwelling) and post-and-lintel structures (No. 1 building), providing a visual sense of ancient living environments.
- *Pottery Deposition Display**: Showcases artifacts such as pottery excavated from the site.
- *Special Exhibition Room**: Features themed displays, such as 'Excavated Nukawa,' focusing on regional archaeological history.
- *Guidance Hall**: An audiovisual presentation helps visitors understand the origins and historical background of the site.
Seasonal Recommendations
The Chojakihara Site Park is set within a lush, natural environment where the scenery changes with the seasons. For those wishing to study the historical ruins closely, visiting during bright daylight hours is recommended. The museum is an excellent option for sightseeing during rainy or hot weather, as the indoor exhibits allow for a deep dive into ancient culture regardless of the weather. You can also enjoy the seasonal changes in the surrounding flora, such as the lily blossoms.
Experiences & Activities
The Chojakahara Archaeological Museum offers more than just viewing; there are programs designed to let you experience Jomon culture firsthand. Specifically, 'Jomon Experience' programs provide opportunities to feel closer to ancient technologies and lifestyles. Additionally, related facilities like the Archaeology Salon and the Jade Culture Research Institute offer more specialized knowledge.
Surrounding Area
The site is located within Miyama Park, making it easy to combine a visit with a stroll through the park. It is also closely linked to other geological and historical sites in Itoigawa, such as the Fossa Magna Museum. Visiting these sites together will deepen your understanding of the geological and historical significance of the Itoigawa region.
Essentials: Clothing, Etiquette & Payment
- *Footwear**: As some areas of the site and the reconstructed dwellings involve unpaved paths, comfortable walking shoes are highly recommended.
- *Payment**: While cash is the primary method for museum fees, credit card availability can vary; please check on-site.
- *Language Support**: While some English signage may be available, detailed explanations are best confirmed in advance.
- *Reservations**: No prior reservation is required for general admission, but please check if you wish to participate in specific experience programs.
- *Photography**: Please follow the specific rules regarding photography within the museum facilities.