NOK to Exhibit at
“Government & Public Sector Week Japan 2025”

Unveiling New Products Addressing Aging Water Infrastructure and Disaster Response

NOK Corporation (Headquarters: Shibadaimon, Minato-ku, Tokyo; Representative Director, Group Chief Executive Officer: Masao Tsuru; hereinafter referred to as “NOK”) will exhibit at “Government & Public Sector Week Japan 2025,” held from Wednesday, July 2 to Friday, July 4 at Tokyo Big Sight (Koto-ku, Tokyo). This will be NOK’s second consecutive appearance. Under the theme “Shaping possibilities with unique technology,” the company will showcase 10 products, including newly developed items.
In response to modern societal challenges such as aging infrastructure and the increasing frequency of natural disasters, NOK is committed to providing technological solutions. At this exhibition, NOK will present concrete examples of such solutions, including Hydrogen Sulfide Detection Rubber and the High-Capacity Pressurized Water Purifier.

Hydrogen Sulfide Detection Rubber is a newly developed product that enhances worker safety during sewer inspections. It will be exhibited for the first time at this event. In recent years, the aging of water infrastructure has become a serious issue nationwide, making inspection work increasingly important. This product can be easily installed on manholes and allows visual confirmation of gas emissions, contributing to both improved worker safety and greater inspection efficiency.
NOK will also introduce products that support safe and secure living in local communities, such as the High-Capacity Pressurized Water Purifier, designed to secure domestic water during disasters. Some of these products have been developed by reflecting the needs of municipalities and public organizations. During the exhibition, NOK will continue to gather feedback to further improve offerings and develop new solutions. Going forward, NOK will continue listening carefully to voices from the field, seeking technological solutions to public sector challenges, and striving toward the realization of a sustainable society.

Technologies Contributing to Public Infrastructure Development and Disaster Preparedness

■ Hydrogen Sulfide Detection Rubber (Newly Developed / First-Time Exhibit)

This is a newly developed rubber material by NOK that changes color in response to hydrogen sulfide. The presence of gas can be visually confirmed, and both the color change and duration of exposure allow for an estimation of hydrogen sulfide concentration. By using this material for pre-inspection checks, workers can safely and confidently carry out inspection tasks.
The product is available in two types: one that attaches to the underside of a manhole cover, and another that can be suspended from the manhole opening, both designed for easy installation and replacement. It offers excellent water and stain resistance, and if it is not fully submerged, it retains its detection functionality even when exposed to rainwater or wastewater.
At this exhibition, a limited 100 sets of Hydrogen Sulfide Detection Rubber sample kits will be available for purchase at 5,000 yen (tax and shipping included).

■ High-Capacity Pressurized Water Purifier (Newly Developed Prototype / First-Time Exhibit)

This product is an 18-liter poly tank with a pressurized pump and integrated water purification functionality. It can purify large volumes of rainwater or river water at once, helping to secure water for handwashing, laundry, and other uses, thus contributing to the maintenance of sanitary conditions during emergencies.
The purification system uses a cartridge equipped with a special hollow fiber membrane developed by NOK. The unit is lightweight and compact, minimizing storage space requirements. The manual pressurized pump requires no electricity, making the unit reliable even during power outages.

■ Hydrogen Detection Rubber

This material changes to blue in the presence of hydrogen gas, allowing for easy visual confirmation of leaks. By installing it on pipes, joints, or flanges where hydrogen leakage is a risk, it enables quick and simple detection. Since it is reusable, it contributes to improved efficiency and cost reduction in long-term inspection operations at hydrogen stations and similar facilities.
This product was developed through a joint research project with Tokyo University of Science, utilizing the property of chromism, in which the material changes color in response to external stimuli. It also offers high flexibility in shape, allowing for custom molding to suit various applications.
At this exhibition, NOK will also showcase a new application by integrating the material with its image recognition system, enabling remote hydrogen leak detection as a potential operational method.

■ Recycled Rubber Mat

This recycled rubber mat is made using flash, excess rubber that forms during the molding and processing of rubber products, collected from NOK’s manufacturing process. NOK produces approximately 9,500 tons of flash annually and actively promotes material recycling as part of its commitment to sustainable manufacturing. This product utilizes flash from high-performance rubber used in NOK’s anti-vibration and soundproofing products, delivering excellent vibration absorption capabilities.
At this exhibition, multiple variations tailored to different installation environments and applications will be showcased, including a new type with improved water drainage performance.

■ LAYSACAM (Anti-Vibration / Soundproofing Product)

LAYSACAM is a sound-absorbing material developed using NOK’s proprietary research and technology, featuring a special shape design optimized for different sound frequencies. It can be designed in a variety of forms, including flat panels, box shapes, and tunnel-like structures, and is also compatible with transparent and flame-retardant materials.
The design reduces the sense of enclosure in the installation space while maintaining safety. With the recent rise in remote meetings in offices and conference rooms, the issue of echo, making voices harder to hear, has become more apparent, driving increased demand for sound-absorbing materials. Leveraging its lightweight and easy-to-install features, we offer stylish acoustic panels that seamlessly blend into office environments.

■ Environmentally Friendly Lubricant “Kluberbio Series” / NOK Klüber Co., Ltd.

The Kluberbio Series is a line of environmentally friendly specialty lubricants developed using NOK Klüber’s unique formulation technology. These lubricants are biodegradable, breaking down into carbon dioxide and water through microbial action. In the event of a spill, they help minimize the risk of environmental contamination, contributing to local environmental safety. This series complies with various environmental regulations and standards, including the EU Ecolabel.
At this exhibition, NOK Klüber will also present a proposal combining these lubricants with an automatic lubrication system developed in-house. This system automatically supplies the optimal grease, improving operational efficiency at municipal pump stations and providing a solution to labor shortages by reducing the need for manual maintenance work.

Technologies That Monitor Physical and Mental Conditions to Support Health and Safety

■ Wearable Echo Sensor

This device uses an ultra-thin, lightweight, and flexible ultrasound sensor that can be worn on the body to capture real-time, high-resolution echo images. Its portable design naturally conforms to the body’s curves, reducing discomfort during use and making it suitable for everyday wear. The sensor enables real-time monitoring and visualization of the body’s condition, supporting health management, rehabilitation, and sports training by helping users maintain wellness and enhance physical performance.

■ Brainwave Measurement System

NOK is developing a system to prevent accidents by measuring attention and concentration levels in real-time using a device equipped with the company’s biosignal rubber electrode. This device is worn on the head and uses soft, skin-friendly biosignal rubber electrode to provide a comfortable wearing experience while obtaining highly accurate brainwave data. The system is designed to detect declines in attention and concentration while driving or working, enabling early risk detection. We have a special corner where visitors can try out a prototype device at this exhibition. We will also introduce how brainwave measurement works and its potential applications.

■ Electrocardiogram (ECG) Sensor System

This system monitors the condition of drivers using a device that wraps around the steering wheel. The device features NOK’s sheet-type rubberized cloth electrode, which combines a urethane-based conductive rubber with fabric made of conductive PET fibers. By measuring electromyogram (EMG) and electrocardiogram (ECG) signals in real time during driving, the system helps assess the driver’s physical condition and supports determining whether safe driving is possible. It is particularly intended for applications such as monitoring the health of drivers in public transportation and supporting safe operation.

High-Functionality Rubber Products for Regional Collaboration

■ Hair Tie “KKOOR (Kukuuru)”

“KKOOR (Kukuuru)” is NOK’s hair tie product made from a new type of silicone rubber with a uniquely star-shaped cross-section. It securely holds hair in place without tangling and, unlike fabric ties, does not absorb sweat or water, making it ideal for use in wet environments or during sports activities. With a wide variety of color options, custom sets can be created, making KKOOR suitable as support merchandise for local sports teams or as novelty items for running and regional events. It serves as a unifying item that fosters community spirit and acts as a memorable keepsake for participants, contributing to regional revitalization.

<Exhibition at Government & Public Sector Week Japan 2025>
•    Organizer:  Government & Public Sector Week Executive Committee
•    Dates: July 2 (Wed) - July 4 (Fri), 2025, from 10:00 AM to 5:00 PM
•    Venue: Tokyo Big Sight, South Exhibition Hall 1 (3-11-1 Ariake, Koto-ku, Tokyo)
　　　　　NOK Booth Number: 7-15
       　　　   Approx. 7-minute walk from Kokusai-Tenjijo Station (Rinkai Line)
          　　　Approx. 3-minute walk from Tokyo Big Sight Station (Yurikamome Line)
・URL：https://www.publicweek.jp/ja-jp/lp/25/vis/pw/shimei.html