成熟 せいじゅく分裂 ぶんれつじゃありませんでした
seijukubunretsujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 成熟分裂

1. It was not maturation division.; It was not mature splitting.

Past/Perfective
Negative
Polite
Terminal Form