Including this, there exist various theories, thought out by scholars in the Edo and other periods, about how much the volume of 1 sho really was in the Nara period, and all of them were just the speculation, merely based on the depiction seen in the penal and administrative law of the period, and on the Chinese system of weights and measures.
以上を含め奈良時代の升量については、江戸時代の学者によるものをはじめ各種の説があるが、いずれも律や令の記述と中国の度量衡制度からの推定に過ぎなかった。