Inside the stone chamber, there was a large wooden container to be looking like a wooden coffin at a glance but better to be regarded as a Mokuhitsu (wooden chest) by a detailed study and about four kilograms of Shu (vermillion) was stored in it.
石室の内部には、一見木棺のようであるが細部を検討すると木櫃（もくひつ）とした方がよい大きな木製容器が置かれて、約4キロの朱が納められていた。