海上 かいじょう保安 ほあん ちょうじゃありませんでした
kaijōhoanchōja arimasendeshita

Noun
Desu Copula

The polite, past negative form of 海上保安庁

1. Was not a Coast Guard.; Was not part of the Coast Guard.

Past/Perfective
Negative
Polite
Terminal Form