noun, takes する, takes genitive case の

  1. betterment, improvement.
  2. kaizen (Japanese business philosophy of continuous improvement). Usually written with kana alone. Often written カイゼン.

Variations

Pronunciation Kanji Kana Is Common
改善 かいぜん

Contained Kanji Breakdown

reformation, change, modify
カイ あらた.める (4th, N2)
self
コ おのれ キ (6th, N1)
strike, hit, folding chair radical variant (no. 66)
ホク (Kentei 1)
person(人) variant
mow, cut grass, subdue
ガイ ゲ おさ.める (Kentei 1)
virtuous, good, goodness
ゼン よ.い よし.とする (6th, N1)
sheep
ひつじ ヨウ よ (3rd, N1)
to divide
king, rule, magnate
オウ -ノウ おお (1st, N3)
grass, straw, herbs
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
mouth
くち コウ ク (1st, N4)