2025.09.23

Over 680,000 Units Sold! The Double-Layer Technology That "Locks In" Underarm Sweat: Why Nissen's 'Takiasessan' Hasn't Stopped Evolving for 10 Years

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#innerwear

#material

#underwear

#sweat

*The text-to-speech feature is generated by AI,
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*The text-to-speech feature is generated by AI,
so there may be errors in the reading.

As a functional innerwear designed to alleviate the discomfort of summer, Nissen's 'Takiasessan' series has been a fan favorite since its 2015 launch. With total sales surpassing 680,000 units, it has become a summer staple for the company.

Why is 'Takiasessan' so beloved and consistently chosen? We spoke with Ai Ikeuchi and Miyuki Suda, the minds behind its development, to uncover the meticulous details poured into its functionality and design.

A Double-Layer Pad to Minimize Underarm Sweat Stains

Nissen has a long history of creating items to tackle summer woes. They had even released products with sweat-absorbent, quick-drying materials and simple sweat pads before 'Takiasessan' came along.

However, the sweat pads on those earlier products weren't particularly high-performance, leading to feedback like, "It can't absorb all my underarm sweat," and "Sweat stains still show up because the pad gets overwhelmed."

Suda: "Our survey data confirmed once again that 'sweat' is the main cause of discomfort in the summer. The results also showed that a staggering 66% of women are worried about sweat stains, with underarm stains being a major concern for many. The increasingly intense summer heat each year only makes this problem more serious.