Nissen Launches 'Ase-izuko', a Super Fast-Drying Innerwear to Solve Extreme Summer Sweat Issues, on May 18
Nissen Co., Ltd. will launch a new functional summer innerwear, 'Ase-izuko', on May 18, 2026. Featuring a unique fabric that instantly absorbs and diffuses sweat, it provides a dry and comfortable fit. Equipped with over 95% UV protection and antibacterial/deodorizing functions, it comes in a wide range of sizes for both men and women. A 200 yen discount campaign runs until May 25.
📋 Article Processing Timeline
- 📰 Published: May 18, 2026 at 20:00
- 🔍 Collected: May 18, 2026 at 11:31
- 🤖 AI Analyzed: May 19, 2026 at 01:21 (13h 50m after Collected)
Nissen Co., Ltd. (Headquarters: Minami-ku, Kyoto; President and CEO: Jun Habuchi) will begin sales of its new summer innerwear proposal, the 'super' fast-drying innerwear 'Ase-izuko', on Monday, May 18, 2026. Designed for everyone troubled by the stickiness of sweat, it features astonishing sweat-absorbing and fast-drying properties that will make you wonder 'Where did the sweat go?'. With comprehensive functions including UV protection and antibacterial/deodorizing features, it supports a comfortable experience during the harsh summer.
Click here for the 'Ase-izuko' special page
Background of Development
- Freeing customers from the discomfort of innerwear clinging to their skin from sweat that pours out the moment they step outside.
To date, Nissen has developed functional innerwear to address various summer concerns, such as the sweat-stain preventing 'Taki-ase-san' (700,000 units sold in the series) and the cooling-focused 'Cho-reikan' and 'Cho-reikan AIR' (1.2 million units sold in the series). However, facing the reality of Japan's increasingly severe heatwaves where previous countermeasures are no longer sufficient, we refocused on the root cause of summer discomfort: 'sweat remaining on the skin'. Our goal was to create a new experience where you even forget you sweat. Precisely because innerwear is indispensable in summer, we wanted to deliver comfort that makes you genuinely think 'I'm glad I wore this'. Born from the tenacity of our developers, we propose a completely new approach to summer innerwear: 'Ase-izuko'.
Product Features
[New Material] Quickly catches & releases sweat with a special knitting method
Adopts a special fabric where the front and back yarns have different functions. Due to these different properties, the yarn on the skin side quickly absorbs sweat from the skin's surface and instantly sends it outward. The moved moisture is then instantly diffused by the outer yarn, and notably, it resists returning to the skin side.
[New Sensation] You'll want to wear it every day! Sticky sweat quickly disappears
The biggest appeal is the smooth, dry comfort that makes you forget you were sweating. The discomfort caused by sticky sweat is gone. It dries easily after washing, making it a highly active summer innerwear that requires frequent changing.
[Multi-functional] Comprehensive features desired in summer innerwear, such as UV protection and antibacterial/deodorizing properties
In addition to absorbing sweat and drying quickly, it covers great summer features such as an 'antibacterial and deodorizing function' that suppresses odors like sweat, 'over 95% UV cut', and 'attached sweat pads' to cover concerning underarm sweat. Furthermore, we thoroughly focused on the comfort of details, such as a 'back binder specification' that makes the neckline look neat, and a 'printed name tag' to prevent the skin from feeling prickly.
Product Overview
- Ladies -
https://www.nissen.co.jp/item/BMM0326B0006
Ase-izuko Short-Sleeved Innerwear (Fast-drying, UV protection, Antibacterial/Deodorizing)
[Colors] 3 colors (Black, Greige, White)
[Sizes]
10 sizes (S, M, L, LL, 3L, 4L, 5L, 6L, 8L, 10L)
[Base Price] 1,419 yen - 2,189 yen (tax included)
*Base price is the price at the initial launch.
https://www.nissen.co.jp/item/BMM0326B0007
Ase-izuko Short-Sleeved Innerwear (Fast-drying, UV protection, Antibacterial/Deodorizing)
[Colors] 3 colors (Black, Greige, White)
[Sizes]
10 sizes (S, M, L, LL, 3L, 4L, 5L, 6L, 8L, 10L)
[Base Price] 1,419 yen - 2,189 yen (tax included)
*Base price is the price at the initial launch.
- Men's -
Ase-izuko V-Neck Sleeveless Shirt with Sweat Pad (Fast-drying, UV protection, Antibacterial/Deodorizing)
[Colors] 2 colors (White, Black)
[Sizes] 7 sizes (M, L, LL, 3L, 4L, 5L, 6L)
[Base Price] 1,639 yen - 2,189 yen (tax included)
*Base price is the price at the initial launch.
https://www.nissen.co.jp/item/BMM0326B0010
Ase-izuko V-Neck Short-Sleeved Innerwear with Sweat Pad (Fast-drying, UV protection, Antibacterial/Deodorizing)
[Colors] 2 colors (White, Black)
[Sizes] 7 sizes (M, L, LL, 3L, 4L, 5L, 6L)
[Base Price] 1,639 yen - 2,189 yen (tax included)
*Base price is the price at the initial launch.
https://www.nissen.co.jp/item/BMM0326B0009
Campaign Overview
* 'Ase-izuko' New Release Commemorative Campaign
Right now, simply by adding it to your cart, eligible items are [200 yen OFF per item!].
- Eligible Period: Monday, May 18, 2026 to Monday, May 25, 2026, at 11:00 AM
- Content: Automatic discount in the cart for the quantity of eligible items purchased
▼ 'Ase-izuko' special page here: https://www.nissen.co.jp/s/inner/IN26SU10
Click here for the 'Ase-izuko' special page
Background of Development
- Freeing customers from the discomfort of innerwear clinging to their skin from sweat that pours out the moment they step outside.
To date, Nissen has developed functional innerwear to address various summer concerns, such as the sweat-stain preventing 'Taki-ase-san' (700,000 units sold in the series) and the cooling-focused 'Cho-reikan' and 'Cho-reikan AIR' (1.2 million units sold in the series). However, facing the reality of Japan's increasingly severe heatwaves where previous countermeasures are no longer sufficient, we refocused on the root cause of summer discomfort: 'sweat remaining on the skin'. Our goal was to create a new experience where you even forget you sweat. Precisely because innerwear is indispensable in summer, we wanted to deliver comfort that makes you genuinely think 'I'm glad I wore this'. Born from the tenacity of our developers, we propose a completely new approach to summer innerwear: 'Ase-izuko'.
Product Features
[New Material] Quickly catches & releases sweat with a special knitting method
Adopts a special fabric where the front and back yarns have different functions. Due to these different properties, the yarn on the skin side quickly absorbs sweat from the skin's surface and instantly sends it outward. The moved moisture is then instantly diffused by the outer yarn, and notably, it resists returning to the skin side.
[New Sensation] You'll want to wear it every day! Sticky sweat quickly disappears
The biggest appeal is the smooth, dry comfort that makes you forget you were sweating. The discomfort caused by sticky sweat is gone. It dries easily after washing, making it a highly active summer innerwear that requires frequent changing.
[Multi-functional] Comprehensive features desired in summer innerwear, such as UV protection and antibacterial/deodorizing properties
In addition to absorbing sweat and drying quickly, it covers great summer features such as an 'antibacterial and deodorizing function' that suppresses odors like sweat, 'over 95% UV cut', and 'attached sweat pads' to cover concerning underarm sweat. Furthermore, we thoroughly focused on the comfort of details, such as a 'back binder specification' that makes the neckline look neat, and a 'printed name tag' to prevent the skin from feeling prickly.
Product Overview
- Ladies -
https://www.nissen.co.jp/item/BMM0326B0006
Ase-izuko Short-Sleeved Innerwear (Fast-drying, UV protection, Antibacterial/Deodorizing)
[Colors] 3 colors (Black, Greige, White)
[Sizes]
10 sizes (S, M, L, LL, 3L, 4L, 5L, 6L, 8L, 10L)
[Base Price] 1,419 yen - 2,189 yen (tax included)
*Base price is the price at the initial launch.
https://www.nissen.co.jp/item/BMM0326B0007
Ase-izuko Short-Sleeved Innerwear (Fast-drying, UV protection, Antibacterial/Deodorizing)
[Colors] 3 colors (Black, Greige, White)
[Sizes]
10 sizes (S, M, L, LL, 3L, 4L, 5L, 6L, 8L, 10L)
[Base Price] 1,419 yen - 2,189 yen (tax included)
*Base price is the price at the initial launch.
- Men's -
Ase-izuko V-Neck Sleeveless Shirt with Sweat Pad (Fast-drying, UV protection, Antibacterial/Deodorizing)
[Colors] 2 colors (White, Black)
[Sizes] 7 sizes (M, L, LL, 3L, 4L, 5L, 6L)
[Base Price] 1,639 yen - 2,189 yen (tax included)
*Base price is the price at the initial launch.
https://www.nissen.co.jp/item/BMM0326B0010
Ase-izuko V-Neck Short-Sleeved Innerwear with Sweat Pad (Fast-drying, UV protection, Antibacterial/Deodorizing)
[Colors] 2 colors (White, Black)
[Sizes] 7 sizes (M, L, LL, 3L, 4L, 5L, 6L)
[Base Price] 1,639 yen - 2,189 yen (tax included)
*Base price is the price at the initial launch.
https://www.nissen.co.jp/item/BMM0326B0009
Campaign Overview
* 'Ase-izuko' New Release Commemorative Campaign
Right now, simply by adding it to your cart, eligible items are [200 yen OFF per item!].
- Eligible Period: Monday, May 18, 2026 to Monday, May 25, 2026, at 11:00 AM
- Content: Automatic discount in the cart for the quantity of eligible items purchased
▼ 'Ase-izuko' special page here: https://www.nissen.co.jp/s/inner/IN26SU10
FAQ
What is Ase-izuko?
It's a summer innerwear brand by Nissen featuring new materials that quickly absorb and diffuse sweat to prevent stickiness.
What sizes are available for Ase-izuko?
It offers a very wide size range: S to 10L for women and M to 6L for men.
How much does Ase-izuko cost?
Prices start at 1,419 yen for ladies' items and 1,639 yen for men's items.