noun
sales campaign; promotional sale
A marketing event where products are sold at reduced prices for a limited time. Wasei-eigo from English 'campaign sale'.
wasei-eigo (Japanese-coined English), from campaign sale
今週末、デパートで大きなキャンペーンセールがある。
There's a big sales campaign at the department store this weekend.
キャンペーンセール中にまとめ買いした。
I stocked up during the promotional sale.