A traditional Japanese low table with a heater underneath, covered by a blanket.

Origin: The word コタツ (kotatsu) originates from the Japanese words 炬燵, which break down into two parts: 'ko', meaning 'fire', and 'tatsu', meaning 'foot warmer'. The concept of a heated table dates back to the 14th century in Japan during the Muromachi period, where it was initially a charcoal brazier placed under a quilt. Historical and Cultural Context: The first iteration of the kotatsu was called a 'hori-gotatsu', a pit in the floor with a charcoal burner. It became a central feature in Japanese homes, providing warmth during the cold months. Evolution: Over time, the traditional charcoal burner was replaced with electric heaters for safety and convenience. The modern kotatsu remains a popular household item, especially in regions with cold winters. Modern Relevance: Today, the kotatsu is not only a practical household item but also a cultural icon in Japan, often depicted in anime and films as a symbol of home warmth and family gatherings.

The kotatsu is so beloved in Japan that many people attribute their winter laziness to its comforting warmth, making it a quintessential part of Japanese winter culture.