にしばんもろこしじゃありませんでした
西蛮蜀黍じゃありませんでした
ni shiban morokoshijārimasendeshita

Noun
Desu Copula

The polite, past negative form of せいばんもろこし

1. Was not a western barbarian.; Was not an old man from Sichuan.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana