にっぽんがまかわずじゃなかったです
日本蟇蛙じゃなかったです
nippongama kawazujanakattadesu

Noun
Desu Copula

The polite, past negative form of にほんひきがえる

1. Was not a Japanese toad.; Was not a toad native to Japan.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana