The act of buying up large quantities of goods to empty stores or corner the market, often affecting supply or prices.
台風の前にトイレットペーパーが買い占められた。
Toilet paper was bought up before the typhoon.
一部の業者がマスクを買い占めて価格をつり上げたと報じられた。
It was reported that some dealers bought up masks and drove up the price.
当局は買い占めを防ぐために販売制限を導入した。
The authorities introduced purchase limits to prevent hoarding.