海中 かいちゅう展望 てんぼう とうじゃありませんでした
kaichūtembō tōja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 海中展望塔

1. It wasn't the marine observation tower.; It wasn't an ocean view tower.

Past/Perfective
Negative
Polite
Terminal Form