"Junhai," written in the last days of the Kamakura period, says that it was a masu with 4 sun square and 2 sun depth (32 cubic sun) and had 0.81 liters, which was 0.45 times of new kyomasu, however, it is considered to be unreliable since the book says it was made by 'Kanji senji' (the imperial order in Kanji era [1087 to 1094]) which was clearly contrary to the fact that the senji-masu was established in the Enkyu era.
縦横4寸、深さ2寸（32立方寸）の枡で、0.81リットル、新京枡の0.45倍の容積とするのは、鎌倉末期に成立した『潤背』によるものであり、これは本文で「寛治宣旨」となっており、延久年間に宣旨升が出されたことに明らかに反しており、信用できないとする。