KONAKA Expands FREEZETECH Clothing Line Amidst Rising Summer Heat in Japan

KONAKA's Innovative Response to Japan's Rising Summer Heat

As Japan faces increasingly scorching summers, KONAKA Corporation, based in Yokohama, Kanagawa, is stepping up its summer apparel offerings under its KOANAKA-FUTATA line. The brand has witnessed great success with the innovative FREEZETECH cooling technology, particularly its Ice Shock Cooling Print, incorporated into quality business shirts launched in June 2025. The response was overwhelmingly positive, leading the company to expand its range of products in 2026. Starting May 16, the latest additions—including business slacks, casual T-shirts, and handkerchiefs—will be available in all KOANAKA-FUTATA stores.

Addressing Japan's Heat Challenge

In recent years, Japan has been experiencing unprecedented summer temperatures. According to data from the Japan Meteorological Agency, the number of days with extreme heat (above 35°C) is on the rise. In 2025, the average national temperature exceeded typical levels, especially in urban areas suffering from the urban heat island effect. For business professionals commuting or working outdoors, the physical toll of the rising temperatures is increasingly severe. As a result, heat countermeasures are no longer just about comfort; they are crucial for maintaining productivity and health.

Understanding this pressing need, KOANAKA-FUTATA has been committed to developing business wear that actively addresses heat stress through innovative design and technology.

New Product Lineup Featuring FREEZETECH

1. Ice Shock Shirts
Featuring separate fabric with the Ice Shock Cooling Print on the collar and inside of the sleeves, these shirts utilize a unique polyester blend to enhance comfort in high temperatures. Available in both long and short sleeves, the design is offered in shades like White, Blue Stripe, and Mint Stripe for long sleeves, and White, Sax Blue, and Gray for short sleeves. Price: ¥7,689 (tax included).

2. Ice Shock BIZ Polo
This stylish polo shirt employs the Ice Shock Cooling Print on the collar lining, ensuring a refreshing feel throughout the day. Made from 100% polyester, it comes in colors such as White, Navy, and Black, starting from Price: ¥7,689.

3. Ice Shock BIZ T-Shirt
Designed for ultimate comfort, this T-shirt incorporates Ice Shock Cooling Print on the inner layer that comes in White and Navy. Price: ¥6,589.

4. Ice Shock Slacks
These slacks are engineered with the cooling print technology on the knee area, along with water, dirt resistance, and stretch functionality. They are designed for household washing, available in sizes from 82cm to 97cm, starting at Price: ¥13,090.

5. Ice Shock Handkerchief
Combining both the cooling print and absorbent Imabari towel fabric, this handkerchief provides continuous cooling upon contact with sweat. It is sized at 24cm x 24cm and priced at ¥1,749.

The Technology Behind FREEZETECH

Developed by Liberta Inc., the FREEZETECH technology is designed to maintain remarkable cooling effects utilizing sweat and airflow. The printed surface on the fabric interacts with moisture to cool down the fabric temperature, enhancing sensations further when exposed to wind. This technology can withstand up to 50 washes while maintaining its efficiency, making it ideal for sports and high-temperature tasks.

Conclusion: A Commitment to Quality

KONAKA aims to elevate shopping experiences by enhancing customer service and incorporating innovative solutions for modern lifestyles. This includes a comprehensive approach to business wear that delivers both functionality and style.

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With over 394 outlets including KOANAKA and FUTATA brands, their commitment reflects a theme of quality across materials, functionality, fashion, and service, forming an essential part of Japan's business attire landscape.