らくせいいわい 落成祝 LinksSentence search for 落成祝Sentence search for らくせいいわいSentence search for 落成祝いKanji details for 落, 成 and 祝Edit in JMdict Noun1. celebration for the completion of a projectOther forms落成祝い 【らくせいいわい】 Discussions Log in to talk about this word.