How to say "checkout" in Japanese

• レジJLPT N4approx.Common
  nounCovers the checkout counter in a shop or supermarket, and the cashier there; it is the shortened form of レジスター, and the two are interchangeable when you talk about where you pay.
  レジはどこですか。↗

  Where's the checkout counter?
• レジスターCommon
  nounThe full form of レジ, with the same senses: the checkout counter or the cashier. Both words are common, so either works when asking where to pay in a store.

For the shop counter where you pay, and the cashier there, 「レジ」 and 「レジスター」 are the same word in long and short form; both cover only this counter sense, not checking out of a hotel or paying online.

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

• レジcheckout (counter)
• レジスターcheckout (counter)