Adverb (fukushi), Noun which may take the genitive case particle 'no'
for the first time
see 始める
16歳の時、初めてテニスをした。When I was sixteen, I played tennis for the first time. Adverb (fukushi)
only after ... is it ...; only when ... do you ...; not until ... do you ...
after the -te form of a verb
Noun
first time; (one's) first
Colloquial
Also written 始めて【はじめて】、甫めて【はじめて】