Attention those troubled by bad odors!! We have posted a deodorization test video.

For deodorizing exhaust and addressing oil mist! Prevents duct dirt and significantly reduces cleaning costs!

The "Sera Block" is a deodorization system using ceramic catalysts that can be installed in duct chambers to address oil mist, oil odors, and smoke issues. Thanks to its unique theory and design (registered design), it achieves both high air velocity and low pressure loss, enabling compact equipment and excellent deodorization and oil mist removal capabilities. It can be flexibly designed and installed to fit various spaces, making it suitable for any installation location. In addition to deodorizing cooking exhaust, it can also be used for odor control in offices and hospitals, as well as for oil mist removal in factories, with numerous successful implementations. 【Features】 ■ Ultra-long lifespan due to ceramic catalysts ■ New technology based on fluid dynamics, achieving a low pressure loss of 0.75mmAq per unit ■ Removes animal and vegetable oils and mineral oils ■ Reduces cleaning frequency and costs to prevent duct contamination and duct fires

• Ventilation and Exhaust

Reusable and long-lasting! Easy odor control with self-repairing ceramic!

"Serra Dynamics" is a technology that uses ceramic catalysts to powerfully deodorize odors from exhaust and other sources. By simply installing it in air conditioning ducts or exhaust ducts, it can strongly adsorb, decompose, and neutralize unpleasant odors, oil mist, and organic solvents, thereby complying with odor prevention laws, PRTR, and neighborhood measures. It can broadly respond to the approximately 300,000 to 400,000 types of odor components. The product lineup that can be selected according to applications and odor component conditions is also appealing. 【Features of "Serra Dynamics"】 ■ Catalytic Action The ceramics themselves continue to exhibit "decomposition reactions" without wearing out. ■ Self-Renewal Function It powerfully decomposes absorbed substances, maintaining and continuing a stable purification ability. ■ Long Lifespan Unlike adsorbents, it can avoid saturation, thus maintaining a semi-permanent lifespan. *For more details, please refer to the materials. Feel free to contact us with any inquiries.

• Air purifiers

Wide-ranging response to foul odors! One or multiple types will be used according to the removal target value from six types, ranging from large to small.

The "Seraclean UFO Series" is a cassette-type UFO device that allows for easy deodorization simply by filling and installing the cassette. It complies with HACCP (Hazard Analysis Critical Control Point) standards for antibacterial, disinfecting, and static bacteria control. It also allows for an increase in deodorization and purification performance by combining a wide variety of options, and pressure (static pressure) adjustments are possible. By mixing various shapes of UFOs, the pressure loss value can be adjusted. 【Features】 ■ Available in six sizes from large to small, allowing for one or multiple types to be stored in dedicated cassettes according to the target removal value. ■ Compatible with HACCP standards for antibacterial, disinfecting, and static bacteria control. ■ Enhances deodorization and purification performance by combining a rich variety of options. ■ Pressure (static pressure) adjustments are also possible. *For more details, please refer to the PDF document or feel free to contact us.

• air conditioning

There are two types with diameters of 100mmΦ and 150mmΦ, and they can also be used for round ducts!

Simply insert it into the duct for deodorization measures. Ideal for medium odor concentration, effective against animal, plant, and mineral oils and fats. It also works well for oil mist, oil odor, and smoke measures! (This is a deodorization device/system.)

• Ventilation and Exhaust

For the treatment of high-concentration odors and large air volumes in factories, it has excellent deodorization performance that removes over 99% of odor components.

"Serra Magic" is a deodorization system suitable for high-concentration odors and large-volume exhausts generated in painting, manufacturing, printing, and food processing factories. Leveraging the catalytic effects of ceramics, it quickly separates and deodorizes smoke, grease mist, fumes, painting tar, flux, and more. It can remove over 99% of odor components such as ammonia, methyl sulfide, and hydrogen sulfide! It also meets environmental regulatory values for odor prevention laws, the PRTR system, VOCs, ISO, and more. [Features] ■ Effective in factories and businesses with high concentrations, strong odors, and large exhaust volumes ■ Excellent decomposition and deodorization capabilities for organic solvents, halogenated substances, and other harmful materials ■ Dedicated storage units (casing, chamber, etc.) are available *For more details, please refer to the materials. Feel free to contact us with any inquiries.

• air conditioning

As the new year begins, I would like to extend my heartfelt congratulations on your continued prosperity. I sincerely appreciate your exceptional support throughout the year. This is the STJ Group (Santelecom Japan, STJ Rentec). Now, I am pleased to announce that we will be opening our "Transceiver & Smartphone Rental Shop" simultaneously at three locations nationwide on January 26 (Monday)! ■ List of Services to be Offered - Same-day pickup/return of rental equipment - Usage explanations and demonstrations of rental equipment - Wireless solutions consultation desk - Mobile BPO service counter As a special promotion to celebrate the opening of the rental shop, we are currently running a special price campaign for picking up rental equipment at the shop! For more details, please contact us!

【Notice of Year-End and New Year Holidays】 Thank you very much for your continued support. Our company will be closed for the year-end and New Year holidays as follows: Holiday Period: Saturday, December 27, 2025 – Sunday, January 4, 2026 Please note that inquiries and orders received during the holiday period will be addressed sequentially starting from Monday, January 5, 2026. We apologize for any inconvenience this may cause and appreciate your understanding.

We would like to inform you about our participation in the IT Trend EXPO 2026 Spring. 《Exhibition Information》 With the concept of "New encounters will change tomorrow's work," one of the largest online exhibitions in the industry will be held. NTT TechnoCross will exhibit in the Human Resources Comprehensive category. We have prepared numerous discussions and sessions featuring special guests who are active on television, allowing even those who are usually busy to efficiently gather information on products and services related to IT and DX. Additionally, the first 10,000 participants will receive a 500 yen Amazon gift card. Please apply early. 《Exhibition Overview》 March 3 (Tuesday) to March 7 (Saturday), 2026, online (free: pre-registration required) 《Participation Application》 https://it.expo.it-trend.jp/key/opl7kgdj *Please apply (free) from the "Receive Ticket / Proceed to Participation Registration" link at the above URL.

The TV commercial "What Will You Do in the New Era?" featuring model and actress Akane Horita will begin airing on December 26, 2025. This work expresses the desire of Tokei Densan to respond to the diverse needs of various industries in today's society, where new technologies, such as the expansion of the AI market, are competing with each other, and to nurture and blossom our customers' futures. Please pay attention to Akane Horita, who is dressed in stylish outfits, listening to the concerns of the target audience and offering support. # CM Overview Title: "What Will You Do in the New Era?" (30 seconds / 15 seconds) CM URLs 30 seconds: https://youtu.be/y_lMs0HRj3w 15 seconds: https://youtu.be/egpzMfh8Kok

Thank you very much for your continued support. We would like to inform you that our company will be closed for the year-end and New Year holidays as follows: Year-end and New Year holiday period: December 27, 2025 (Saturday) to January 4, 2026 (Sunday) We apologize for any inconvenience this may cause and appreciate your understanding. *Please note that inquiries made through our website will also be responded to after January 5, 2026 (Monday).