Iwajuku Site, Archaeological site in Midori, Japan
Iwajuku is a Paleolithic site in Midori, Japan, spread across a hill near the Watarase River. The site includes several excavation zones connected by a museum with covered display areas.
An amateur archaeologist discovered the site in 1946, proving for the first time human settlement in Japan during the Paleolithic period. Later investigations confirmed tools from at least two different time spans separated by several thousand years.
The site sits on a terraced slope, where several excavation zones are protected from weather by covered shelters. Visitors can observe the different soil layers where tools from separate eras were uncovered.
The on-site museum displays geological cross-sections and finds in clear arrangements, with free entry for all visitors. Parking is available directly at the grounds, and pathways between excavation zones are built on level terrain.
Researchers found oval stone axes and plant harvesting tools in a deep dark soil layer, suggesting early use of plant resources. These finds show that people here around 30,000 years ago not only hunted but also deliberately gathered plants.
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