"I want them to come home safely every day" - Jutoku's "Breeze Duct A" achieves a -6°C reduction in helmet interior temperature to protect workers from heatstroke, responding to the heartfelt wishes of loved ones.

In May 2026, Jutoku Co., Ltd. (Toyohashi City, Aichi Prefecture, CEO: Tetsuji Kamimura) received numerous inquiries following the announcement of their heatstroke prevention product for helmets, "Breeze Duct A (Advance)."

Inquiries came not only from infrastructure industries such as electricity, gas, and telecommunications, as well as construction and facility maintenance companies, but also from individuals and business owners who said, "I want to give this as a gift to my family member who works outdoors," or "Our company has only a few employees, but we'd like to try this for heatstroke prevention."

What was common among these messages, even before delving into product details, was the earnest desire to "protect loved ones from heatstroke." Having the opportunity to engage with such voices, Jutoku is further strengthening its efforts in head heat countermeasures, which are often overlooked even with the widespread use of air-conditioned clothing. As part of this initiative, an experiential exhibit of Breeze Duct A will be held at the "Occupational Safety and Health Exhibition" in July 2026.

Breeze Duct A is a patented product (Patent acquired: May 2025) that reduces helmet interior temperature by approximately -6°C (Note 1) simply by attaching it to existing air-conditioned clothing. It requires no additional power and can be easily attached to current equipment, making it a product that workers can readily adopt.

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"We want to respond to the wishes of colleagues and family members who pray for safety through Breeze Duct A." (Naruyuki Nagahama, Senior Managing Director, Jutoku Co., Ltd.)

Even with increasing mandates, some worksites lack adequate measures.

In June 2025, the revised Industrial Safety and Health Act came into effect, mandating heatstroke countermeasures in the workplace with penalties for non-compliance. While companies are accelerating their measures, not all worksites are on the same starting line.

In fields like construction, facility maintenance, and infrastructure inspection, many individuals work alone as sole proprietors or independent contractors. In environments without organized manuals or dedicated safety personnel, countermeasures are left to individual judgment, and the risk of heatstroke remains.

The overlooked blind spot: the head.

The importance of hydration and resting in cool places is widely known as a heatstroke countermeasure. However, measures for the head are often overlooked in worksites where helmets are worn.

The Ministry of Health, Labour and Welfare's "Manual for Heatstroke Prevention Measures in the Workplace" points out the danger of head heatstroke: "Heatstroke occurs when body temperature exceeds 40°C and the hypothalamus (the center for body temperature regulation) in the brain is impaired, leading to coma and life-threatening conditions." (Note 2) Managing the temperature of the head, which houses the brain that controls body temperature regulation, is directly linked to life.

Furthermore, regarding the dangers of wearing a helmet, Professor Kozo Hirata (Environmental Physiology) of Kobe Women's University points out, "If sweat on the head continues to be trapped inside a helmet, sweat evaporation is suppressed, impairing the effect of 'selective brain cooling' and causing brain temperature to rise." (Note 3) Ventilation and cooling of the head are fundamental challenges in heatstroke prevention.

Despite this, there is a persistent sentiment in worksites that "the stuffiness inside helmets cannot be resolved." Even with the widespread adoption of air-conditioned clothing (workwear with fans), countermeasures for head heat are still lagging.

Infrastructure industry, facility maintenance, construction, security... tasks where head heat countermeasures are a challenge.

A patented technology that delivers the airflow from air-conditioned clothing into the helmet.

"Breeze Duct A (Advance)" was developed to address this challenge.

By simply attaching it to an existing helmet, it can deliver airflow from air-conditioned clothing into the helmet, enabling head cooling and alleviating stuffiness.

【Main Features】

1 Approximately -6°C reduction in helmet interior temperature**

Guides airflow from air-conditioned clothing into the helmet via a dedicated duct for constant ventilation and elimination of stuffiness. The neck cover structure prevents air from escaping before reaching the head.

2 Blocks solar radiation with heat-shielding fabric (titanium coating)**

The titanium-coated fabric blocks direct sunlight, and its synergistic effect with airflow reduces heat burden around the neck and back of the head.

3 No additional power required. Simply attach to existing equipment**

With no electrical or mechanical parts, the risk of malfunction is low, and it can be used repeatedly. It can be introduced at a lower cost.

4 Design that does not block ears, ensuring worksite safety**

The unique structure, which prevents fan noise from occurring near the ears, allows for clear hearing of surrounding voices and instructions.

The "Breeze Duct" series has obtained a patent for its structure, which guides airflow from air-conditioned clothing into the helmet through a ventilation path (tube) along the wearer's neck (Patent acquired: May 2025).

Demonstration experiment results for temperature change (company research)

What customer feedback taught us.

Following the product announcement in May 2026, inquiries poured in from infrastructure, construction, and facility maintenance sites, and some of these voices were particularly memorable.

First, there was an inquiry from someone working at a company with only a few employees. The message stated, "We may not be able to purchase many, but we are attracted to the product as a heatstroke countermeasure and would like to try one first."

We also received feedback from individual customers. One inquiry read, "My family member works outdoors. Can I purchase this as a summer heat countermeasure gift?"

A product developed for businesses was reaching the hands of individuals concerned about the safety of their employees and families – this fact was a welcome shock to Jutoku as well. In both cases, beyond interest in product specifications or price, there were the wishes of business owners and family members who worried about their employees and families and prayed for their well-being.

Kazuhiro Kato, Sales Planning Department, states:

"I was deeply moved by the warmth and earnestness of the customer feedback we received this time. To deliver our products, we must continue to think about and stay close to the worksites and people who use them. This was an opportunity to reaffirm that this is the core of our manufacturing."

Naruyuki Nagahama, Senior Managing Director, states:

"Since the development of the initial model in 2022, Breeze Duct A has been improved based on valuable feedback from our customers. Our mission at Jutoku is to provide products that respond to the wishes of colleagues and family members who pray for safety.

The stuffiness inside helmets is often overlooked because it's invisible, creating a risk. We will continue to address such overlooked social issues and strive to support the safety of as many people as possible."

Wearing on construction sites Wearing during outdoor work

About the Breeze Duct A Experiential Exhibit

Jutoku Co., Ltd. will exhibit at the "13th Tokyo Occupational Safety and Health Exhibition" held at Tokyo Big Sight from July 15th to 17th, 2026.

At the venue, visitors can experience wearing Breeze Duct A and directly feel the coolness inside the helmet. We will listen to the worksite challenges faced by safety and health managers and propose practical improvement hints.

Safety measures are not complete once implemented; it is crucial that they are accepted by workers and continue to be used on-site. Jutoku proposes products based on the perspective of the worksite, focusing on "wearability" and "continued use." Under this policy, at our booth, we will showcase products centered around "Breeze Duct A," as well as the high-performance work cap "Ryo Safety" that addresses minor head impacts and heat, and "Hiyari Guard" which prevents everyday near-miss accidents. These products enhance safety and comfort without significantly altering existing operations. Furthermore, we plan to unveil our new product under development, "Ice Vest with Less Burden on the Body."

13th Tokyo Occupational Safety and Health Exhibition Dates: July 15 (Wed) - 17 (Fri), 2026 Venue: Tokyo Big Sight, East Hall 7 Booth Number: 7-ZD03

Exhibition Details: https://hs-osh.jma.or.jp/tokyo/visit/

Product Details: https://sagyouboushi.com/breezduct_a/

Product Overview

Product Name

Breeze Duct A (Advance)

Size

Flap: Approx. 400 x 290mm Belt: Approx. 700 x 25mm

Material (Flap)

Outer fabric: 100% Polyester (Taffeta/Water-repellent finish)

Lining: 100% Polyester (Titanium coating)

Material (Duct)

100% Polyester (Sweat-absorbent and quick-drying material), Bellporon (core material)

Material (Band)

Elastic band (Non-slip: Silicone material)

Color

Gray

Country of Origin

Japan (Made in Japan)

Product Detail URL

https://sagyouboushi.com/breezduct_a/

How to Purchase

- EC Site:

https://item.rakuten.co.jp/zaou/okw00110/

- Inquiries:

https://sagyouboushi.com/%e3%81%8a%e5%95%8f%e5%90%88%e3%81%9b/

Company Profile

Company Name: Jutoku Co., Ltd.

Location: 4-12 Mukaiyamaikecho, Toyohashi City, Aichi Prefecture

TEL: 0532-63-5511 / FAX: 0532-63-5513

URL: https://www.jutoku.co.jp/

Founded in 1941. Jutoku Co., Ltd., based in Toyohashi City, Aichi Prefecture, operates with the business domains of "Protecting the safety of Japanese food," "Making Japanese work sites comfortable," and "Energizing local communities," engaging in the planning, manufacturing, sales, and logistics of sales promotion goods and work-site apparel products.

Contact Person for this matter: General Affairs Department, Koube

TEL: 0532-63-5511 E-mail: j.koube@jutoku.co.jp

【References】

*1: Based on internal experiments. In a 31°C environment, with helmet interior temperature at 38.8°C [summer scenario], a reduction of approximately -6°C in helmet interior temperature was achieved after about 10 minutes of airflow, compared to when not worn.

*2: Ministry of Health, Labour and Welfare, "Manual for Heatstroke Prevention Measures in the Workplace"

Source: https://www.mhlw.go.jp/file/06-Seisakujouhou-11200000-Roudoukijunkyoku/manual.pdf

*3: Nikkei newspaper (August 11, 2018) article "Cooling the head and neck is key in extreme heat; tips for heatstroke prevention, including using parasols" - Comment by Professor Kozo Hirata (Environmental Physiology), Kobe Women's University.

Source: https://www.nikkei.com/nstyle-article/DGXMZO33941000Y8A800C1000000/