買う vs 購入する
Japanese word comparison
Listen to 買う
Listen to 購入する
| 買う | 購入する |
|---|---|
KA-u verb (transitive) | こうにゅうする (kounyuu suru) verb (transitive) |
| to buy; to purchase | to purchase; to buy (formal, often used in written or business contexts) |
How they differ
購入する is a more formal, often written or business-oriented equivalent of 買う; it emphasizes the transactional or official aspect of buying and is common on receipts, contracts, and reports. It does not carry the casual, everyday nuance that 買う does.
When to use each
When to use 買う: Prefer 買う in everyday spoken Japanese and casual written contexts to sound natural and neutral.
When to use 購入する: Prefer 購入する in formal writing, business communication, receipts, or when describing purchases in an official/reporting tone.
Side-by-side examples
- 昨日、新しい靴を買った。
(I bought new shoes yesterday.) - 昨日、新しい靴を購入した。
(I purchased new shoes yesterday.)
Register & nuance: 購入する is more formal and businesslike than the colloquial 買う; it's common in written and official contexts.