かく融合 ゆうごう発電 はつでんじゃありませんでした
kaku yūgōhatsudenjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 核融合発電

1. Was not nuclear fusion power generation.; It wasn't nuclear fusion power generation.

Past/Perfective
Negative
Polite
Terminal Form