Improve

"Improve" in Japanese

好転する

kōten suru

(to become better)

改善する

kaizen suru

(to make something better)

改良する

kairyō suru

(to make something better)

良くする

yoku suru

(to make something better)

良くなる

yoku naru

(to become better)

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.