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  1. Home
  2. Electrical equipment construction business
  3. 星和電機
  4. Japan's first! Developed and delivered a new tunnel LED lighting system using direct current power supply.
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  • Apr 15, 2019
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Apr 15, 2019

Japan's first! Developed and delivered a new tunnel LED lighting system using direct current power supply.

星和電機 星和電機
Hoshi and Electric Co., Ltd. has been supplying lighting fixtures for numerous roads and tunnels since 1957, when it delivered lighting fixtures for the Kanmon Tunnel, the world's first underwater tunnel at that time. In 2010, it supplied Japan's first LED tunnel lighting fixtures to the Enoura Tunnel, which is under the direct jurisdiction of the Ministry of Land, Infrastructure, Transport and Tourism, continuously leading the way in tunnel lighting in Japan. The newly developed tunnel LED lighting system, the first of its kind in Japan, features a power supply unit installed in the electrical room, providing direct current to the lighting fixtures in the tunnel. This innovation allows for the miniaturization and lightweight design of the fixtures. While conventional products had the power supply unit within the fixture itself, this new product does not, enabling a more compact design and significantly reducing installation work. Additionally, by consolidating the power supply unit in the electrical room instead of within the fixture, maintenance has been simplified. Recently, we have supplied the tunnel LED lighting system for the Kyuuzan Tunnel (downward L=1,704m) on National Route 185, under the jurisdiction of the Hiroshima Road Office of the Chugoku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism.
Ministry of Land, Infrastructure, Transport and Tourism, Chugoku Regional Development Bureau, Hiroshima National Route Office, National Route 185 Kiyama Tunnel (Downward L=1,704m)
Ministry of Land, Infrastructure, Transport and Tourism, Chugoku Regional Development Bureau, Hiroshima National Route Office, National Route 185 Kiyama Tunnel (Downward L=1,704m)
LED tunnel lighting fixture
LED tunnel lighting fixture
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●DC方式トンネル照明システム.pdf[204818]

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Japan's First! Development and Release of a New Tunnel LED Lighting System Using Direct Current Power Supply
The newly developed tunnel LED lighting system, the first of its kind in Japan, has achieved miniaturization and weight reduction of the lighting fixtures by installing the power supply unit inside the electrical room and supplying power to the fixtures in the tunnel with direct current. Conventional products had the power supply unit inside the fixture itself, but this product allows for miniaturization since there is no power supply unit inside the fixture, significantly reducing installation work. Additionally, by consolidating the power supply unit in the electrical room instead of inside the fixture, maintenance has been simplified.
Seiwa Electric Co., Ltd.
Homepage of Seiwa Electric Co., Ltd.

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Sign lighting using tunnel lighting fixtures, the first of its kind in the country.

We have delivered sign lighting using tunnel lighting fixtures, the first of its kind in Japan, to the Shin-Meishin Expressway (from Takatsuki JCT/IC to Kobe JCT).

Sign lighting refers to tunnel lighting that glows white, which flashes red during a vehicle fire, and flashes yellow in the event of abnormalities such as accidents, falling objects, or broken-down vehicles, alerting drivers. This allows drivers to drive with peace of mind.

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The first pacemaker light using tunnel lighting fixtures in the country.

We have delivered the first-ever tunnel lighting fixtures using pacemaker lights on the Shin-Meishin Expressway (Takatsuki JCT/IC to Kobe JCT) in Japan.

The Pace Maker Light is a tunnel lighting system that shines white and has green lights illuminating in the direction of travel, creating a flow of light that drivers feel compelled to match in speed, helping to restore speed and alleviate traffic congestion. Conversely, when drivers exceed the green light, the Pace Maker Light serves as a technology that assists in speed regulation.

  • Fluorescent Light Type

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星和電機
Electrical equipment construction business
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Impersonation prevention accuracy improved by up to 56%, streamlining development with an integrated API.

CyberLink releases a new version 7.8 of the AI facial recognition engine FaceMe SDK, improving anti-spoofing accuracy by up to 56% and streamlining development with an integrated API.

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**Improvement of Spoofing Prevention Accuracy and Performance** With FaceMe SDK 7.8, we enhance measures against increasingly sophisticated spoofing attacks by improving authentication accuracy and processing speed, thereby increasing the safety and reliability of facial recognition. - IR + RGB Spoofing Prevention: Detection accuracy improved by up to 35%, processing speed improved by up to 15% - 3D Spoofing Prevention: Detection accuracy improved by up to 56.8% for Intel RealSense D415 **Reducing Development Burden with the New Integrated API "FaceMe Authenticator"** We have integrated multiple processes that previously required individual implementation into a single API. Integrated Functions: - Face Detection + Feature Point Extraction + Spoofing Prevention + Authentication Processing Features: - Compatible with Windows / Ubuntu x64 / Android - 2D cameras, 3D depth cameras, and IR + RGB cameras can be used through a single interface - Significantly reduces development burden while maintaining high-accuracy authentication

Feb 27, 2026

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On February 26, 2026, an advertisement for the bridge expansion device "Hybrid Joint" was published in the Tohoku 6 Prefectures edition of the Sankei Shimbun, demonstrating a durability of 100 years (3LII type) verified by a third-party organization.

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Crittec Industries Co., Ltd. published a newspaper advertisement (black and white, full-page 15 columns) for the bridge expansion device "Hybrid Joint" in the February 26, 2026 issue of the Sankei Shimbun Tohoku 6 Prefectures edition. In Japan, the number of bridges over 50 years old is rapidly increasing, making the longevity of bridges a critical issue. The expansion devices, which are considered a cause of bridge damage, require high water-tightness and long-term durability. Our expansion device "Hybrid Joint" offers multiple types tailored to different bridge types and conditions. Among them, the "Hybrid Joint 3LII type" has demonstrated a durability of 100 years in fatigue loading tests conducted by a third-party organization. It has successfully passed 12 million cycles of repeated loading at a maximum load of 260 kN, confirming performance equivalent to a 100-year design service life for bridges. We have numerous delivery records in the six Tohoku prefectures and can accommodate a wide range of bridge types, including steel and PC bridges. The special website linked to the advertisement allows for the review of detailed materials and inquiries or requests for documents. Please make use of it for comparing and considering bridge renewal and repair plans. Crittec Industries will continue to contribute to the longevity of bridges nationwide, starting with the Tohoku region.

Feb 26, 2026

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[New Product] High brightness × wide × high cost performance. Announcement of the linear lighting LLWK-N series born from a field perspective.

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Born from the voices on the ground, high brightness × wide coverage × high cost performance linear lighting. To respond to the production site’s demands for "brighter," "wider," and "easier to use," we have launched the new high brightness linear lighting LLWK-N series, which balances high brightness and high cost performance. While achieving approximately three times the illuminance compared to the conventional LLWG series, we maintain an easy-to-implement price range. With a natural heat dissipation structure suitable for clean rooms and a compatible design that makes it easy to replace existing lines, we are thoroughly pursuing the "ease of use" required on-site. For detailed product specifications and inquiries about implementation, please feel free to contact us.

Feb 25, 2026

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Bed placement

We also carry out the installation of flooring and wooden decks.

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Our company not only sells building materials but also carries out flooring and wood deck construction within Okinawa Prefecture. For more details, please contact us. - Raised floor - Steel floor - Direct installation - Conventional floor - Recycled wood / wood deck

Feb 25, 2026

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Clean Room Notebook - Dust-Free Paper Notebook (Using Staclean)

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Adopted by major semiconductor manufacturers. Over 10,000 copies produced annually. This high-quality cleanroom notebook (dust-free paper notebook) has been loved for many years in "Silicon Island Kyushu," where some of the world's leading semiconductor manufacturing companies are located. It uses Sakurai Co., Ltd.'s "Staclean RV (recyclable dust-free paper)" and is designed for professional use, minimizing dust generation to the utmost. It supports "writing" in semiconductor factories, precision equipment manufacturing sites, and medical environments. [Main adopting companies: SCK, JASM, RSMC, and many others] ■ Three reasons why Yoneura Printing's "Cleanroom Notebook" is chosen: - Proven track record: Adopted by multiple major semiconductor companies in Kyushu, with an annual production and sales record of over 10,000 copies. - Use of the highest quality dust-free paper: The main paper uses "Staclean RV Violet 72g," and the cover uses "Clean Paper RC 175g," achieving low dust generation. - Size options tailored to the workplace: A lineup ranging from standard A4 and B5 sizes to convenient mini sizes that fit into cleanroom pockets. ■ Product lineup: - Clean Notebook A4 @400~ - Clean Notebook B5 @380~ - Clean Pocket (mini size) @225~

Feb 24, 2026

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