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  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 for the Enoura Tunnel, which is under the direct jurisdiction of the Ministry of Land, Infrastructure, Transport and Tourism, continuously leading tunnel lighting in Japan. The newly developed tunnel LED lighting system, the first of its kind in Japan, features a power supply unit installed inside 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 reduction in size and significantly easing 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 (downhill L=1,704m) on National Route 185, under the jurisdiction of the Hiroshima National Route 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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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 their kind in Japan, to the Shin-Meishin Expressway (from Takatsuki JCT/IC to Kobe JCT).

Sign lighting refers to tunnel lighting that shines white. In the event of a vehicle fire, it flashes red, and in the case of accidents, falling objects, or breakdowns, it flashes yellow to alert drivers. This allows drivers to drive their vehicles with peace of mind.

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The first domestic pacemaker light using tunnel lighting fixtures.

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

The Pace Maker Light is a tunnel lighting system that shines white and has green lights that illuminate in the direction of travel, creating a flow of light that drivers instinctively try to catch up with, helping to restore speed and alleviate traffic congestion. Conversely, when drivers exceed the green light, the Pace Maker Light employs technology to assist in speed regulation.

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星和電機
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[Cast Iron Repair] We will repair cracks that have occurred in metal equipment without applying heat.

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The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact on the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Sep 06, 2025

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"Welding repair crack repair" We will repair metal cracks without applying heat.

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The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact to the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If you require a detailed technical explanation, please contact us.

Sep 06, 2025

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[Cast Iron Crack] We will repair cracks in metal products without applying heat.

  • NEW
  • PRODUCT

The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact on the base material. Repairs can be carried out even in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is kept to a minimum. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Sep 05, 2025

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【Metal Crack Repair】We repair cracks in metal products without applying heat.

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  • COMPANY

The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without any thermal impact on the base material. Repairs can be conducted in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is required, please contact us.

Sep 05, 2025

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We will exhibit at the 22nd Plumbing and Equipment Comprehensive Exhibition 2025 OSAKA.

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We will be exhibiting jointly with Ando Corporation at the "22nd Pipe and Equipment Comprehensive Exhibition 2025 OSAKA," which will be held for three days from September 11 (Thursday) to September 13 (Saturday), 2025, at Intex Osaka, Hall 6A. Please be sure to stop by when you visit. 【Exhibition Schedule】 ● Environmentally friendly heat exchanger "Heat Recovery Heat Exchanger" ● Cut model of "Stainless Steel High Efficiency Heat Exchanger" ● Skeleton model of heating and cooling heat exchanger "SK Water Coil" ● Cooling heat exchanger "SK Water Coil Cartridge Type" ● Radiant heating pipe for space heating "SK Aerofin Tube" ◆ Event Dates: September 11 (Thursday) to September 13 (Saturday), 2025 10:00 AM to 5:00 PM (until 3:00 PM on the last day) ◆ Venue: Intex Osaka, Hall 6A Address: 1-5-102 Nanko-Kita, Suminoe-ku, Osaka City, Osaka Prefecture, 559-0034 Access: https://www.intex-osaka.com/jp/access/ ◆ Booth Number: 112 ◆ Admission Method: Pre-registration required (free) *Please check the official website for details.

Sep 04, 2025

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