人工 じんこう魚礁 ぎょしょうではありませんでした
jinkōgyoshōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 人工魚礁

1. Was not an artificial reef.; It was not an artificial reef.

Past/Perfective
Negative
Polite
Formal Register