- 買う【かう】 - to buy, to purchase, to value (highly), to think highly of, to have a high opinion of, to appreciate, to recognize, to incur (someone's anger, displeasure, etc.), to elicit (e.g. sneers), to invite (e.g. scorn), to evoke, to arouse, to win (someone's favour), to accept, to take on, to take up, to pay for (a prostitute, geisha, etc.) 
- 買い物【かいもの】 - shopping, purchased goods 
- 買収【ばいしゅう】 - acquisition (esp. corporate), buy-out, takeover, purchase, bribery, buying off, corruption 
- 売買【ばいばい】 - trade, buying and selling, trafficking (e.g. of humans, arms, drugs), dealing 
- 買い手【かいて】 - buyer 
- 購買【こうばい】 - procurement, purchase, buying, school store, co-op, school canteen, tuck shop 
- 買い占める【かいしめる】 - to buy up 
- 買取【かいとり】 - purchase, buying, buying out, buying used articles as a company, trade-in, buy back, purchase on a no-return policy, lump-sum payment, flat fee 
- 仲買【なかがい】 - brokerage 
- 買い【かい】 - buying, shopping, buyer, purchase 
- 買い占め【かいしめ】 - buying up of goods, cornering (market) 
- 買い付け【かいつけ】 - buying, purchasing 
- 買い上げ【かいあげ】 - buying, purchasing, procurement 
- 購買力【こうばいりょく】 - buying power, purchasing power 
- 買い入れ【かいいれ】 - buying, purchasing, laying in 
- 買い戻し【かいもどし】 - repurchase, redemption 
- 買い入れる【かいいれる】 - to purchase, to buy in 
- 買い控え【かいびかえ】 - restrained buying 
- 青田買い【あおたがい】 - speculatively buying a rice harvest, while the fields are still green, recruiting of university students before the agreed date 
- 買い出し【かいだし】 - going out to shop, going shopping, buying in quantity, buying wholesale, bulk purchasing