一割(いちわり)

いちわり
noun
one tenth; 10 percent
quantitynumber
1. one tenth; 10 percent
One part out of ten. Japan uses the 割 system where one 割 equals 10%, alongside the percentage system.
売上(うりあげ)の一割(いちわり)が利益(りえき)だ。
One tenth of the sales is profit.
参加者(さんかしゃ)のうち一割(いちわり)が外国人(がいこくじん)だった。
About 10% of the participants were foreigners.
定価(ていか)から一割(いちわり)引(び)きで購入(こうにゅう)できるクーポンを使(つか)った。
I used a coupon that let me buy it at a 10% discount from the regular price.

The 割(わり) system is Japan's traditional way of expressing fractions and percentages. 一割(いちわり) = 10%, 二割(にわり) = 20%, etc. Below 一割(いちわり), the scale continues with 分(ぶ) (1%) and 厘(りん) (0.1%).

Common collocations

  • 一割(いちわり)引(び)き — 10% discount
  • 一割(いちわり)増(ぞう) — 10% increase
  • 一割(いちわり)負担(ふたん) — 10% co-payment (especially in healthcare)
  • 約(やく)一割(いちわり) — about 10%

THE 割(わり) SYSTEM:

  • 一割(いちわり) = 10%
  • 三割(さんわり) = 30%
  • 五割(ごわり) = 50% (half)
  • 三割五分(さんわりごぶ) = 35% (used especially in baseball batting averages)

Similar words

Cultural note

The 割(わり) system is used commonly in daily life for discounts (二割引(にわりびき) = 20% off), medical co-payments (三割負担(さんわりふたん) = 30% co-pay), and baseball statistics (打率(だりつ)三割(さんわり) = .300 batting average).

general
Added 2026.4.29 21:37 · Revised 2026.9.2 13:02
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