まとめ買(が)い

まとめがい
noun
bulk buying; buying in quantity
1. bulk buying; buying in quantity; purchasing multiple items at once
the practice of buying many items or large quantities at one time, often to save money or time
週末(しゅうまつ)にまとめ買(が)いをする。
I do bulk shopping on weekends.
日用品(にちようひん)はまとめ買(が)いした方(ほう)がお得(とく)だ。
It's more economical to buy daily necessities in bulk.
セールでまとめ買(が)いしすぎた。
I bought too much stuff at the sale.

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.

Related Words

Synonym: 買(か)いだめ (stocking up; hoarding)
general
Added 2026.1.25 9:54 · Revised 2026.3.31 12:18
08000/08046_matomegai