The only people you see shaking heat packs these days are people who were born in the Showa era.
People from the Showa era are the only people who still shake hand warmers before they use them.
ーThe only people you see shaking heat packs these days are people who were born in the Showa period.
「今時ホッカイロを振るのは昭和時代に生まれた人だけだよ」
to shake で「振る」
heat packs で「ホッカイロ」
the Showa period で「昭和時代」
ーPeople from the Showa era are the only people who still shake hand warmers before they use them.
「ホッカイロを使う前に振るのは、昭和の人だけだよ」
the Showa era で「昭和時代」とも言えます。
hand warmers で「ホッカイロ」
ご参考まで！
カナダ 
