Japan Now! Why Japan’s Summer Heat Isn’t Letting Up Even After El Niño Arrived? 🇯🇵 (6/10)

Japan’s “Sauna” Weather

Unlike the dry, manageable summer heat of California, Japan’s summer is defined by extreme humidity. In Tokyo, daily temperatures routinely soar past 38°C (100°F) with humidity levels hovering around 80%. Under these conditions, the heat index can easily exceed 45°C (113°F), turning the cities into giant saunas.

The Rise of the “Fan-Jacket” Culture

To survive this oppressive environment, Japan has popularized a unique high-tech trend: Kucho-fuku, or “fan-assisted clothing.” These are lightweight jackets and vests equipped with two small, battery-powered electric fans sewn into the back. The fans continuously blow air inside the clothing, evaporating sweat and instantly lowering the wearer’s body temperature.

From Workwear to Mainstream Fashion

Just a few years ago, these fan-jackets were strictly industrial workwear for construction workers. However, as temperatures hit record highs, major apparel brands redesigned them with sleek, stylish silhouettes. Today, they are a mainstream summer fashion statement worn by commuters, hikers, and youth hitting outdoor theme parks.