蛍雪 けいせつ いさおじゃありませんでした
keisetsuno isaojārimasendeshita

Noun
Desu Copula

The polite, past negative form of 蛍雪の功

1. It wasn't due to my meager efforts.; It wasn't thanks to my small contributions.

Past/Perfective
Negative
Polite
Terminal Form