途端とたん Common Noun Adverb English jmdict 1 noun (common) (futsuumeishi) adverb (fukushi) just (now, at the moment, etc.);just as;in the act of;as soon as;at the moment that これをきいたとたん、彼は真っ青になった。 On hearing this, he turned pale.
途端にとたんに Common Adverb English jmdict 1 adverb (fukushi) just as;right after;in the act of;as soon as;at that moment その知らせを聞いた途端に、彼は青ざめた。 On hearing the news, he turned pale.