まとめ買(が)い

Compound of まとめ (combining, from まとめる) + 買(か)い (buying, with rendaku → がい). Refers to purchasing many items or large quantities at once.

Common patterns

• まとめ買(が)いをする: to buy in bulk
• まとめ買(が)いで安(やす)くなる: to get cheaper by buying in bulk
• まとめ買(が)いする: to bulk-buy (suru verb usage)

Similar words

• 買(か)いだめ: stocking up, hoarding (implies storing for future use)
• 大量(たいりょう)購入(こうにゅう): large-quantity purchase (more formal)
• ついで買(が)い: impulse add-on purchase
• 衝動(しょうどう)買(が)い: impulse buying

Cultural note

With the popularity of コストコ (Costco) and online shopping, まとめ買(が)い has become increasingly common in Japan. Supermarkets also offer まとめ買(が)い discounts.