In Japanese winter, few things feel more comforting than sliding your legs beneath a warm blanket and settling into a kotatsu. Soft light, gentle heat, and a shared table — the kotatsu is not only a heater, but a space that brings people together. What Is a Kotatsu? A kotatsu is a low table with a built-in heating unit. A thick blanket (called a futon) is placed between the table frame and the tabletop, trapping heat underneath. You slip your legs inside, and warmth wraps around you instantly. Unlike central heating, the kotatsu warms your body rather than the ...