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The inventor is Koji Ichitani, a former engineer at Sony and founder of Kuchofuku Co., Ltd. In 1994, while on a business trip to Southeast Asia, he witnessed booming construction across the region. He worried that if developing countries relied heavily on air conditioners just like Japan, it would trigger a global energy crisis. Thus, he set out to create a cooling solution that consumes barely any power.

Back in Japan, he came up with an idea: the human body cools itself down naturally through sweat evaporation. Why not make the most of this "natural body air conditioner"? He then put forward the Physiological Cooling Theory: install small fans on clothing to boost air circulation inside the garment, speeding up sweat evaporation and delivering physical cooling effects.

He first experimented with water-cooled designs featuring built-in water pipes, but the idea was abandoned due to leakage issues, bulky structure and high costs.

Later, he switched to the air-cooled solution. Two mini fans were fitted on the back to draw in outside air, which circulates inside the clothes and flows out through collars and cuffs.

More than 1,000 types of fabrics were tested, and a special air-tight material was finally selected to lock in airflow effectively.

The shape and position of the fan blades were precisely adjusted down to the centimeter, ensuring strong airflow, low power consumption and quiet operation.

The first generation of Kuchofuku air-conditioned clothing was officially launched in 2004.