いざ鎌倉 かまくらではありません
iza kamakuradewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of いざ鎌倉

1. It is not as if [it will be] Kamakura.; It’s not a done deal.; Not so fast.

Negative
Polite
Formal Register