Introduction of Case Study for Kajima Corporation / KEYes: Reduction of Key Management Costs and Efforts at Construction Site Offices

The introduction of KEYes smart padlocks has achieved improved operational efficiency!!

We will introduce a case where the introduction of KEYes smart padlocks by the electric company significantly improved operational efficiency. If you would like to know more details, please feel free to contact us.

• Entrance and exit control system

The lid opens with the unlocking operation from the smartphone app! You can store keys and security cards!

In addition to key boxes, we also sell padlocks and wire lock types!

• Cabinets and Boxes

The wire will be released by the unlocking operation from the smartphone app!

In addition to wire locks, we also sell products such as padlocks and key box types!

• Other safety and hygiene products

Smart padlock with locking detection function.

We have officially released a new smart padlock equipped with a "lock detection feature." Traditional padlocks and other companies' smart locks often lack functionality to prevent "forgetting to lock," but this product is equipped with a sensor inside the padlock that detects whether the shackle is down. By using the "lock notification feature" that we have provided, you can manage locking more rigorously. Please feel free to contact us for more details.

• Entrance and exit control system

Introduction of smart padlocks and key boxes for access control in construction site offices, theft prevention, high-altitude work vehicles, cubicles, distribution boards, lockers, keys.

【Smart Key Box That Can Be Unlocked with a Smartphone】 Users granted unlocking permissions can unlock the key box using a dedicated smartphone app and retrieve the keys inside. There is no longer a need to go to work or travel just to hand over keys. There is also no need to duplicate keys for each person. It can be easily installed just by hanging it on existing doorknobs or fences! There is no need to spend money on replacing fixtures! Additionally, the main key box has obtained IP66 certification, meaning it is "completely protected against dust intrusion" and "not adversely affected by strong direct jets of water from any direction," making it suitable for outdoor use. 【What is the Key Lock Service?】 The Key Lock Service is a keyless padlock system that allows unlocking operations via a dedicated app installed on a smartphone. Unlocking permissions for the padlock can be granted through a web-based management screen, and unlocking is performed via Bluetooth. Furthermore, it digitizes operation records of "when," "which padlock," "who," and "where" it was opened, allowing all unlocking histories of the padlocks to be checked on the web-based management screen. This can be used not only for managing entry and exit of vacant rooms but also for analyzing viewing numbers and decision rates.

• others

On November 6th (Thursday) to 7th (Friday), 2025, we held the "Human Body Day 2025" at the NAC Image Technology Akasaka Multi-Purpose Space. We have uploaded videos of the highlights from each company and the presentations that took place on the day to our website. We encourage you to take a look. ---[Report on Human Body Day 2025 is here]------------------- https://info.nacinc.jp/jintaiday2025-report ------------------------------------------------------------------------- On the day of the event, participants were able to experience a wide range of products in a hands-on session format, including motion capture, force plates, eye tracking, and human body analysis software. We received numerous comments from attendees expressing high satisfaction, saying, "It was great to gain various information all at once," which makes us very happy. NAC Image Technology will continue to provide "valuable products to our customers." We hope you will join us for our next event as well.

The date for the "Tokai Area Electrical and Electronic WEB Technology Seminar" for the 2026 fiscal year has been decided. Registration has started, so if you are interested, please apply. Multiple participants from one company are allowed, so please make use of this opportunity to acquire basic knowledge. 【April】Basic Knowledge of Resistors 【May】Technical Course on Capacitors 【June】Basics of Motors and How to Choose the Optimal Driver 【July】Fundamentals of IC Socket and Connector Selection 【September】Basics of Magnets 【October】Failure Phenomena of Chip Resistors and Their Countermeasures 【November】Temperature Protection Design Using Thermal Fuses

NDT Mart & Rental Co., Ltd. began selling its new product, the handheld magnet "YokeLite-100V," on December 25, 2025. ◆ Handheld Magnet "YokeLite-100V" The YokeLite-100V is an AC handheld magnet (gap-type magnetizer) used for magnetic particle testing (MT). With a compact design weighing approximately 2.4 kg, it is easy to handle and allows for efficient non-destructive testing work on-site. It generates a powerful alternating magnetic field, supporting the detection of defects such as cracks in welds and on metal surfaces. It features a variable yoke structure, enabling flexible adaptation to various inspection targets, including curved surfaces, corners, and fillet welds. It ensures a lifting power of over 4.5 kg, providing sufficient magnetization capability required for magnetic particle testing. Additionally, by equipping optional UV lights or white lights, it can accommodate a wide range of inspection methods, including fluorescent magnetic particle testing and visual inspections, offering excellent cost performance. This handheld magnet is useful for defect inspection and quality control in the fields of manufacturing, plant equipment, and welding inspection. It combines lightweight design with high inspection performance, contributing to improved work efficiency.

NDT Mart & Rental Co., Ltd. began selling its new electromagnetic ultrasonic thickness gauge, 'EMAT WIFI', on January 19, 2026. ◆ Electromagnetic Ultrasonic Thickness Gauge 'EMAT WIFI' The 'EMAT WIFI' is a thickness gauge that uses the electromagnetic ultrasonic (EMAT) method, which does not require a couplant (contact medium). Unlike conventional ultrasonic thickness gauges (UT), there is no need to apply a couplant; thickness measurements can be taken simply by placing the probe on the measurement target, making it ideal for beginners and screening in large-scale sites. It can measure materials with paint, scale, thick linings, and slight surface roughness, significantly reducing the hassle of pre-treatment. Additionally, it is equipped with WiFi communication capabilities, allowing for the confirmation and management of measurement data and waveforms in conjunction with smartphones and tablets. This facilitates smooth sharing of measurement results and data management on-site. It is optimal for measuring wall thickness and conducting corrosion inspections of plant equipment, piping, tanks, and steel structures. It contributes to the efficiency and reliability of thickness measurements in the field of non-destructive testing (NDT), such as maintenance inspections and equipment diagnostics.

NDT Mart & Rental Co., Ltd. began sales of its new dual thickness gauge, the 'CT3500', on January 28, 2026. ◆ Dual Thickness Gauge 'CT3500' The 'CT3500' is a portable thickness gauge that supports a wide range of coating measurements from thin films to thick films. It employs a dual measurement method using electromagnetic and eddy current techniques, allowing for automatic differentiation between ferrous and non-ferrous substrates to measure coating thickness. The measurement range accommodates up to 3,500μm, making it suitable for measuring coatings from general painting to heavy anti-corrosion coatings and linings. With a measurement speed of approximately 0.2 seconds, it allows for efficient measurements even in inspection tasks that require multiple points. It is not only compact and easy to carry, but its display features an inclined design that is easy to see from both above and the front. Additionally, the upside-down display and background color (white/black) switching enhance visibility in dark, narrow, and outdoor environments, making it suitable for quality control within factories as well as for equipment inspections and painting checks in outdoor settings. It can be utilized for a wide range of applications, including painting management of bridges and steel structures, anti-corrosion coating measurements for pipes and tanks, and quality control in manufacturing sites. The 'CT3500' is a high-performance portable thickness gauge that provides stable measurements from thin to thick films, designed for field use.