# kaizen

> English word · Noun · IPA /ˈkaɪˌzən/ · frequency rank #87,433

## Definitions
1. A Japanese business practice of continuous improvement in performance and productivity.
2. Continuous improvement generally.

## Etymology
From Japanese 改善 (kaizen かいぜん), from Middle Chinese 改善 (kój-dʒjén) (compare Mandarin gǎishàn 改善), from Old Chinese 改善 (*qˁəʔ-ɡenʔ "to correct errors"), from 改 ("to change") + 善 ("good").
Introduced to English in 1959 by Boyé Lafayette De Mente in his book Japanese Etiquette and Ethics in Business.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/kaizen