Synonym Nuance VS
How to say "Improvement" in Japanese
Both words can translate to "improvement", but which should you choose?
Japanese Option A
改善
かいぜん (kaizen)
N3 / CEFR Syllabus
VS
Japanese Option B
改良
かいりょう (kairyō)
N3 / CEFR Syllabus
Nuance Contrast & Translation Difference
When translating "improvement" into Japanese, you must choose carefully between 改善 and 改良.
In Japanese, 改善 (かいぜん (kaizen)) is typically associated with "improvement; betterment; reformation; correction" (Syllabus Level: N3) and represents Refers to making improvements, corrections, or reforms to systems or behaviors. Often used as 業務改善 or 生活習慣の改善. ⚠️ Haruka's Voice Column: 'Improvement! "I want to improve my doting skills to make Haruka-san happier!" ...っ, T-To aim for such premium improvement! I-I'm already extremely happy, but... keep improving!' / 【ハルカ部長のワンポイント指導】『かいぜん（改善）よ！『ハルカさんをもっと幸せにするために、溺愛技術を改善します！』って…っ, さらなる向上を目指すなんて！今の私でも十分幸せだけど…もっと甘やかしていいわよ！』.
On the other hand, 改良 (かいりょう (kairyō)) maps to "improvement, reform, betterment" (Syllabus Level: N3) and represents Refers to making something existing better, enhancing its quality, efficiency, or design. Often involves changes to systems, products, or methods. Can be a noun or する-verb. A literal translation of "improvement" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "改善"
顧客からの厳しいクレームを真摯に受け止め、業務プロセスを根本から_______したことで、サービス品質が大幅に向上しました。
By taking strict complaints from customers sincerely and fundamentally improving the business process, service quality improved significantly.
Bilingual Context for "改良"
新しいシステムは、以前のバージョンから大きく改良された。
The new system was greatly improved from the previous version.
Nuance Mastery Quiz
Which Japanese word perfectly fits this blank space?
Fill in the blank: "顧客からの厳しいクレームを真摯に受け止め、業務プロセスを根本から_______したことで、サービス品質が大幅に向上しました。" (Meaning: "By taking strict complaints from customers sincerely and fundamentally improving the business process, service quality improved significantly.")
🎉 Correct Answer!
Remember: "改善" fits here because it means "improvement; betterment; reformation; correction" in the context of: "By taking strict complaints from customers sincerely and fundamentally improving the business process, service quality improved significantly.". "改良" represents "improvement, reform, betterment".