夏山 なつやま ふゆ さと方式 ほうしきでしょう
natsuyama fuyusato hōshikideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 夏山冬里方式

1. Probably in summer mountains, winter inside.; Likely a seasonal method/way.

Polite
Presumptive
Conjecture