As a Swiss person, I know how important it is to stay comfy inside the house when it's cold outside. Apparently, Japanese people from the 14th century in
Slay winter with a heated Kotatsu table bed from Japan
Japanese Kotatsu: One of the wonders Japanese culture
In Japan, they have beds with in-built heaters and table tops to keep them warm in winter
Winter Life in Japan, Tech & Life, Trends in Japan
Kotatsu (heated table) - The Centre of Domestic Life in Japan - Renae Lucas-Hall
Japanese Kotatsu: Staying Warm in Winter - JapanLivingGuide.net - Living Guide in Japan
Keeping Warm in Rural Japan – The Haruna Home
The Kotatsu Desk Keeps You Warm and Cozy While Working From Home
Kotatsu Dining for Winter: at Restaurants, on a Train, and at Home
TIL that that Japanese have invented and frequently use a heated table-blanket called a Kotatsu that they use to keep warm while sitting. : r/todayilearned