改良工事 かいりょうこうじ Meanings Noun improvement work (construction); betterment Kanji 改 reform. Read as カイ. 良 good. Read as リョウ. 工 craft. Read as コウ. 事 matter. Read as ジ. Common phrases 改良工事を行う 改良工事を進める Jinuma: Japanese Dictionary · Word lists