This horse's impost is 58 kilograms.
basis weight; weight of 1000 sheets of paper
Paper industry term; the weight of 1000 sheets used as a measure of paper thickness.
See also: 連量
The basis weight of this paper is 70 kilograms.
斤 (kin, a traditional unit of weight) + 量 (ryō, quantity). The exact historical derivation is uncertain, but the spelling is conventionally associated with measured weight.