Iwajuku Site

Overview and Charm

The Iwajuku Site is a historical site of immense significance in the history of Japanese archaeology. Previously, it was believed that human life in Japan did not exist before the Jomon period (the era of pottery). However, in 1946, Tadayoshi Aizawa discovered obsidian stone tools at this site, proving the existence of the Paleolithic Age in Japan. This discovery is celebrated as the moment that opened the "door to the oldest history research" in Japan. Today, the term "Iwajuku Age" is even used to commemorate this monumental find.

History and Cultural Background

The history of the Iwajuku Site began with the discovery in 1946. Tadayoshi Aizawa found stone tools within the red soil (Kanto Loam layer) exposed in a roadside cutting. At the time, many believed the Kanto Loam layer was unsuitable for human habitation, but Aizawa remained steadfast in his belief, eventually discovering the decisive obsidian spearhead in 1949. This event showed the world that Japanese history reached much further back than previously imagined. The site is now a designated national historical site and is carefully preserved.

Main Highlights

The Iwajuku Museum offers exhibits that trace the path of this great discovery. The most notable items are the obsidian spearheads that served as the key to the find, as well as the stone tool groups excavated from the Iwajuku II site. Visitors can also learn about the structure of the site and the history of Aizawa's excavations, including the geological characteristics of the Kanto Loam layer. The exhibits provide a wealth of materials to understand the environment and the daily lives of people tens of thousands of years ago.

Recommended Times and Seasons

It is most common to visit the Iwajuku Site and Museum during daylight hours. Visiting in the morning, when the museum is calm, allows for a more contemplative viewing experience. The surrounding landscape changes beautifully with the seasons, and since the site is nestled in a rich natural environment, a visit can be combined with a pleasant nature walk.

Experiences and Activities

At the museum, you can deepen your knowledge of Japan's Paleolithic Age through the displayed stone tools and archaeological materials. Rather than a simple viewing, the exhibits allow you to feel a connection to the very origins of human progress. You can also gain a deeper understanding of the local topography and geological features through visual educational materials.

Surrounding Area

The area surrounding the Iwajuku Site is surrounded by lush nature. The museum grounds include materials related to Tadayoshi Aizawa and explanations of the local topography, which help visitors understand the environment of the era. The entire region is enriched by these historical vestiges.

What to Bring, Clothing, and Etiquette

Please note the following when visiting:

• Payment: Cash or credit cards are accepted (please verify specific methods on-site).
• English Support: Please check on-site for the availability of English-language guidance.
• Reservations: No prior reservation is required, but visiting during standard opening hours is recommended.
• Clothing: While the museum interior is comfortable, walking shoes are recommended if you plan to observe the surrounding terrain.
• Photography: There may be restrictions on photographing exhibits. Please follow local instructions.
• Accessibility: The museum interior is largely barrier-free, but the outdoor archaeological areas may have uneven surfaces or steps.
• Etiquette: To protect the precious artifacts and the site, entering restricted areas or touching exhibits is strictly prohibited.