こうたんさい 降誕祭 LinksSentence search for 降誕祭Sentence search for こうたんさいKanji details for 降, 誕 and 祭Edit in JMdict Noun1. Christmas; NativitySee also キリスト降誕祭 キリストこうたんさいNoun2. celebration of the birthday of a saint or great man Discussions Log in to talk about this word.