やすもとたんじゃなかったです
安本丹じゃなかったです
yasumo totanjanakattadesu

Noun
Desu Copula

The polite, past negative form of あんぽんたん

1. It wasn't safe.; It wasn't reliable.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana