How to say "coupon" in Japanese

• 券けんJLPT N3approx.Common
  noun, noun (suffix)The general word for a ticket or certificate; 'coupon' is only one of its senses, so it fits coupon-like slips rather than the discount voucher specifically — for that, クーポン is the usual choice.
  この券けんは２週間しゅうかん有効ゆうこうです。↗

  This ticket is good for two weeks.
• クーポンCommon
  nounThe loanword for the discount sense: a coupon or voucher giving a price reduction or free item, in stores or online. When 'coupon' means a promotional discount, this is the word you want.
• 引換券ひきかえけんCommon
  nounA slip you hand over in exchange for goods — an exchange ticket or claim tag. It covers 'coupon' only in this redemption sense, not the everyday discount coupon; for that use クーポン.
  引き換ひきかえ券けんを見みせて下ください。↗

  May I see your claim tags?

Choose 「クーポン」 for discount or promotional coupons, 引換券 for a slip exchanged to claim goods, and 券 for tickets and certificates generally, with 'coupon' only one of its senses.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 券けんticket
• クーポンcoupon
• 引換券ひきかえけんexchange ticket
• クーポン券クーポンけんcoupon (ticket)
• 引換証ひきかえしょうreceipt
• 補助券ほじょけんvoucher
• 利用券りようけんticket
• 利札りさつ(interest) coupon