陸上 りくじょう作戦 さくせん本部 ほんぶじゃありません
rikujōsakusenhombujārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 陸上作戦本部

1. It is not the land operations headquarters.; It's not the ground operations HQ.

Negative
Polite
Terminal Form