落らく成せい祝いわいMeaningsNoun1. celebration for the completion of a projectOther spellings落らく成せい祝いわいUsage share unknownKanji used落fall down成become祝celebrateComposed of落らく成せいcompletion (of a building)Noun祝いわいcongratulation; congratulations; celebration; festival; congratulatory gift; presentNoun