こうろぎじゃなかったです
蟋蟀じゃなかったです
kōrogijanakattadesu

Noun
Desu Copula

The polite, past negative form of こおろぎ

1. Wasn't a cricket.; Wasn't a grasshopper.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana