Japan introduced the sho of the Tang Dynasty, and established both the unit of daisho (larger sho) that had the volume of about 0.71 liters (about 0.4 size of the new kyomasu [masu mainly used in Kyoto]) and the unit of shomasu (smaller sho) that had the volume of about 0.24 liters (a third of daisho, and about a 10th size of the new kyomasu), a theory says.
日本では、当時の唐の升を導入し、大升を約0.71リットル（新京升の約0.4倍）、その3分の1の小升を約0.24リットル（同0.1倍）としたとの説がある。