Marked “Hichozan” and “made by Maru(circle mark) hei”. Hichozan was a large organization located in Kyushu, the southern island of Japan. The organization did not make any porcelain itself but had large workshops decorating blanks from other factories. Most of the blanks were made at Mikawachi where the Hirado kilns were located. They also ordered underglaze decorated wares that they could supply to their clients. These bowls fall into that category and were made for Hichozan, by the Hirado kilns.
The size of the bowls are all different and the lids are poorly fitted, probably due to the warping in the kilns or simply the mismatching of the bowl to the lid which would have been fired in different parts of the kiln and perhaps not united with its original partner. The dimensions are 4 5/8" across and 4" high.