さんかめいがじゃなかったです
三化螟蛾じゃなかったです
sankameigajanakattadesu

Noun
Desu Copula

The polite, past negative form of さんかめいが

1. Was not a rice stem borer moth.; Wasn't a rice stem borer moth.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana