やまとしんじゃなかったです
大和真蜱じゃなかったです
yamato shin janakattadesu

Noun
Desu Copula

The polite, past negative form of やまとまだに

1. Wasn't Yamato-dama.; Wasn't a Yamato tick.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana