noun
law of supply and demand
Economic principle describing the relationship between the availability of a good and the desire for it.
需要供給の法則によって、価格は需要と供給のバランスで決まる。
According to the law of supply and demand, prices are determined by the balance of supply and demand.
Compound of 需要 (demand), 供給 (supply), and 法則 (law).