決済する

• Reading: けっさいする
• Romaji: kessaisuru
• Kanji breakdown: 決 (ketsu) — decide, settle; 済 (sai) — finish, relieve
• Pronunciation: /keQ.sa.i.sɯ.ɾɯ/

Meaning

To make payment; to settle a transaction. Used for completing financial payments or clearing accounts.

A Group 3 (irregular) する-verb: 決済 (settlement) + する. Covers all forms of payment completion — credit card transactions (カード決済), electronic payments (電子決済), and bank transfers. More formal than 払う (to pay); 決済 implies an official or systematic completion of a transaction.

Examples

1. クレジットカードで決済することは可能ですか。 Is it possible to pay by credit card?
2. オンラインショップでは電子マネーで決済する人が増えている。 More and more people are paying with electronic money at online shops.
3. 月末までにすべての請求を決済しなければならない。 All invoices must be settled by the end of the month.

Usage Guide

Context: business, shopping, finance

Tone: neutral

Origin & History

From Sino-Japanese: 決 (ketsu, decide/settle) + 済 (sai, finish/relieve). Literally 'to decide and finish' — completing a financial obligation.

Cultural Context

Era: Modern

Generation: Adults

Social background: Universal