It was used for both ritual and utilitarian purposes, and many examples have been found in Japanese tombs, where they form part of the basis of dating archaeological sites.
The ornate decorations of Yayoi pottery were replaced by a plain, undecorated style, and the shapes began to become standardized.
In the Nara period, Haji ware was often burnished and smoke-blackened by being fired in an oxygen-reduction atmosphere but at low temperatures.
[3] Haji ware is typically a rust-red pottery, made of clay that was built up in rings or coils, rather than being thrown on a potters wheel.
One pot that was found at an archaeological site in Hachiōji, Tokyo has a globular body, averted mouth, rounded base, solid triangular handle, painted in dark grey pigment on one side with a human face painted on the front.