Description
昭和2年の土採り工事で石室の一部が露出したのを契機に、国・県による発掘調査が行われた。石室天井石にある縄掛突起（東日本唯一の例）の重要性から、昭和4年にいち早く国史跡に指定された。中央には西上総の旧跡保護に尽力した小熊吉蔵が座っている。
Data source
Digital Archive System ADEAC
ADEAC is a cloud-based platform system to search and browse various digital archives. Cross-search, search of digitalized full-texts, browse of high-quality images and so on are possible.
Contents holder/Provider
Aggregator
National Diet Library
The National Diet Library (NDL), founded in 1948, is the library which belongs to the Diet. The NDL assists the activities of the National Diet. The Library collects and conserves materials and information both from Japan and abroad, serving as a foundation of knowledge and culture and providing library services to administrative and judicial entities and Japanese citizens.
Last updated
July 20, 2026