ワイシャツじゃなかったです
Yシャツじゃなかったです
waishatsujanakattadesu

Noun
Desu Copula

The polite, past negative form of ワイシャツ

1. It wasn't a dress shirt.; It wasn't a shirt.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana