Shirabe
途端 に

途端とたん

Common Noun Adverb
Español jmdict
1
noun (common) (futsuumeishi)adverb (fukushi) tan pronto como
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.