水上 すいじょう 母艦 ぼかんじゃなかったです
suijōkibokanjanakattadesu

Noun
Desu Copula

The polite, past negative form of 水上機母艦

1. Was not a seaplane tender.; Wasn't a seaplane carrier.

Past/Perfective
Negative
Polite
Casual Register