ロクセンヤッコではありませんでした
rokusen yakkodewārimasendeshita

Noun
Desu Copula

The polite, past negative form of ロクセンヤッコ

1. Was not a six-year-old.; Was not a Rokusen Yakko (historical entertainer).

Past/Perfective
Negative
Polite
Formal Register