Guide
The Iwajuku Site is a landmark of immense significance in the history of Japanese archaeology. Previously, it was believed that human life in Japan did not exist prior to the Jomon period (the era of pottery). However, in 1946, Tadayoshi Aizawa discovered obsidian stone spearheads at this site, proving the existence of the Paleolithic period in Japan. This discovery opened the door to the earliest chapters of Japanese history and is so significant that the term 'Iwajuku Era' is often used to commemorate this era.
The history of the Iwajuku Site began with the groundbreaking discovery in 1946. Tadayoshi Aizawa found stone tools within the Kanto Loam layer (red clay) exposed along a roadside cutting. While contemporary archaeologists believed such layers could not support human life, Aizawa remained steadfast in his research, eventually discovering the definitive obsidian stone spearheads in 1949. This event showed the world that Japanese history reached much further back than previously imagined. Today, the site is a protected National Historic Site.
The Iwajuku Museum offers exhibits that trace the path of these monumental discoveries. The most notable items are the obsidian spearheads that served as the key to the discovery, alongside various stone tools unearthed from the Iwajuku II site. Visitors can also learn about the structure of the Kanto Loam layer and the history of Tadayoshi Aizawa's excavation methods. The exhibits provide a window into the environment and daily lives of humans tens of thousands of years ago.
It is best to visit the Iwajuku Site and Museum during daylight hours. Visiting in the morning is recommended for a more tranquil experience, allowing you to appreciate the exhibits without crowds. The surrounding landscape changes beautifully with the seasons, and since the site is nestled in a natural environment, a visit can be combined with a relaxing walk through nature.
At the museum, you can deepen your knowledge of Japan's Paleolithic period through the display of stone tools and archaeological materials. Rather than just a simple viewing, the exhibits offer a sense of connecting with the very origins of human progress. You can also gain a visual understanding of the local topography and geological features through various educational displays.
The area surrounding the Iwajuku Site is rich in natural beauty. The museum grounds include materials related to Tadayoshi Aizawa and geological explanations, which help visitors understand the environmental context of the hills and terrain of the time. The entire region is steeped in historical significance.