Noun, used as a suffix, Noun, Adverb (fukushi)
as soon as ...; just after ...; immediately after ...
私は角を曲がって、開店早々の食堂を見つけた。I turned the corner and caught sight of a newly opened restaurant. Adverb (fukushi)
hurriedly; in haste; quickly; promptly; early
usu. as 早々に
Also written 早早【そうそう】