Hirao Jūsanzuka

Hirao Jūsanzuka is an archaeological site in Inagi containing thirteen earthen mounds spread across the landscape in a distinct pattern. The mounds range in size and are positioned to reflect the arrangement of burial grounds from ancient times.

The mounds were created during the Jōmon period, one of the earliest phases of Japanese prehistory. They document how people organized their burial practices and communities thousands of years ago.

The way the thirteen mounds are arranged shows how ancient communities organized their burial grounds and honored their dead. These arrangements reflect the social structure and beliefs of people who lived here many centuries ago.

The site is accessible year-round and visitors can explore the mounds on foot without special equipment or preparation. The location is easy to reach and the earthen formations are visible from nearby paths and roads.

Excavations revealed pottery fragments and tools buried with the dead, offering clues about daily life in prehistoric times. These discoveries show what materials and technologies the ancient inhabitants had at their disposal.

Location: 稲城市

Address: Japan, 〒206-0823 Tokyo, Inagi, Hirao, 2-chōme−８３−１２

Phone: +81423772121

Website: http://city.inagi.tokyo.jp/kanko/rekishi/inagishikyodoshiryoshitsu/rekishitenjishitsu1.html

GPS coordinates: 35.60469,139.48981

Latest update: December 14, 2025 15:00