Emperor Gosanjo enforced the reorganization of manors, and as a part of it, in 1072 he officially established a masu, which would be called Enkyu senji-masu (the standard masu set by the imperial order in the Enkyu era [1069 to 1074]) in later days.
後三条天皇は荘園整理を断行し、その一環として1072年、後に延久宣旨枡（せんじます）と呼ばれる公定の升を定めた。