Walking through Tokyo during summer, you notice hand-held fans everywhere. Among them, a light-blue fan held by Eimi Nakayama stands out. Her fan is a high-tech version with a small metal plate. This plate relies on the science of semiconductors. It uses electrical currents to create a cooling effect.
Eimi Nakayama, a 20-year-old university student, described the sensation. “It’s like holding a cold drink against your neck,” she explained. The plate technology also makes the airflow feel cooler.
These advanced cooling devices are gaining popularity in East Asian cities. A severe heat wave recently hit the region. It led to canceled baseball games in South Korea and introduced a new term in Japan: kokushobi, or “cruel heat day.”
Summers in East Asia are growing hotter and longer. “Personal cooling” solutions now play an essential role in everyday life. The market has evolved from basic hand-held fans. It now features diverse products like air-conditioned clothing and cooling sprays that promise quick temperature drops.
Sales of these cooling products are increasing rapidly. Both employers and governments view them as necessities today.
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