こくぞうむしじゃなかったです
穀象虫じゃなかったです
kokuzōmushijanakattadesu

Noun
Desu Copula

The polite, past negative form of こくぞうむし

1. Wasn't a grain weevil.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana