さつまいもじゃなかったです
さつま芋じゃなかったです
satsumaimojanakattadesu

Noun
Desu Copula

The polite, past negative form of さつまいも

1. Wasn't a sweet potato.; It wasn't a sweet potato.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana