効率(こうりつ)

こうりつ
noun
efficiency
1. efficiency
The ratio of useful output to total input; how effectively time, resources, or effort are used to produce results.
仕事(しごと)の効率(こうりつ)を上(あ)げたい。
I want to improve my work efficiency.
この方法(ほうほう)は効率(こうりつ)が悪(わる)いので変(か)えよう。
This method is inefficient, so let's change it.
AIを導入(どうにゅう)したことで、業務(ぎょうむ)の効率(こうりつ)が大幅(おおはば)に改善(かいぜん)された。
By introducing AI, work efficiency was significantly improved.

The ratio of useful output to total input. Very common in business, engineering, and daily life to describe how well resources (time, energy, money) are used.

COMMON COLLOCATIONS:

  • 効率(こうりつ)がいい/悪(わる)い: efficient/inefficient
  • 効率(こうりつ)を上(あ)げる: to improve efficiency
  • 効率(こうりつ)が落(お)ちる: efficiency drops
  • 作業(さぎょう)効率(こうりつ): work efficiency
  • 燃費(ねんぴ)効率(こうりつ): fuel efficiency

DERIVED FORMS:

  • 効率的(こうりつてき)（な）: efficient (na-adjective — extremely common)
  • 効率(こうりつ)化(か): making things more efficient
  • 非効率(ひこうりつ): inefficiency

SIMILAR WORDS:

  • 能率(のうりつ): productivity, efficiency (more focused on human labor)
  • 生産性(せいさんせい): productivity (economic term)
general
Added 2026.2.18 15:08 · Revised 2026.3.27 21:15
11500/11794_kouritsu