夏山 なつやま ふゆ さと方式 ほうしきであれば
natsuyama fuyusato hōshikideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 夏山冬里方式

1. If it were a summer mountain, winter inside style; If it were a summer mountain, indoor style

Ba Conditional