Time Periods
Paleolithic
Mesolithic
Neolithic
Chalcolithic
Bronze Age
Iron Age
Classical Period
Post-Classical Period
Early Modern Period
Industrial Period
Contemporary Period
Time Periods
Paleolithic
Mesolithic
Neolithic
Chalcolithic
Bronze Age
Iron Age
Classical Period
Post-Classical Period
Early Modern Period
Industrial Period
Contemporary Period
About
The Nemuro Peninsula Chashi Sites consist of twenty-four historically significant Ainu fortifications, known as chashi, situated on the Nemuro Peninsula in Hokkaidō, Japan. These defensive structures, dating from the 16th to the 18th centuries CE, are strategically located on bluffs that provide a commanding view over the Sea of Okhotsk. They are characterized by their U-shaped or semicircular moats, which served as defensive barriers. The sites are well-preserved and reflect the Ainu's strategic use of the natural landscape for protection. Notably, these chashi are linked to the 1789 Menashi–Kunashir rebellion, highlighting their role in regional conflicts. Their inclusion in Japan's Top 100 Castles underscores their cultural and historical importance.
Gallery
Explore photographs of ancient structures, artifacts, and archaeological excavations at Nemuro Peninsula Chashi Sites

Archaeological Features
Explore the unique architectural and cultural elements found at this historical site
Defensive Structures
Environmental and Natural Features
Historical Timeline
Journey through time and discover key events in this site's archaeological history
Plan Your Visit
Details
- Country
- Japan
- Source
- Wikipedia
More Sites in Japan

Shinoridate
Fortified residence with earthworks and moat
Kamo Site (Ishikawa)
Multi-period site with administrative ruins

Moshiriya Chashi
Ainu fortified chashi on elevated site
Tosaminato
Ancient port settlement with defensive structures.
Binmanji Ishibotokedani Necropolis
Medieval Japanese necropolis with 1600 tombs.
Shirakawa Kanga ruins
Nara to Heian period administrative complex