Japanese Akihabara-based retailer Thanko is all about practical gadgets delivered with a sense of humor, whether it be clip-on air conditioning units or a creepy office hand that caresses your face as you work. Thanko is already gearing up for winter hi-jinks, this time with a wearable kotatsu--Japan's impossibly comfy furniture for staving off the cold.

If you're not familiar with kotatsu, they are low-situated tables with a heater installed underneath, which then trap the heat with a heavy and comfy blanket. They're very much a staple of Japanese houses with no central heating, and have a reputation for lulling people to sleep with their comforting warmth, as well as providing refuge for cats. Thanko's new release takes the heating system of a kotatsu and applies it to a sleeping bag that allows for extra mobility so you don't have to be trapped by the laziness kotatsu often instill in people.

An open flap at the bag's bottom for your legs allows you to move around while constantly applying heat.

It's equipped with three heat settings (Celsius) of 35, 45, and 55 degrees. It also features a timer, an extra defense against the sleep-inducing powers of kotatsu, as well as blanketed arms and a warming pocket.

The wearable kotatsu sleeping bag is available from Thanko for 7,980 yen.