List of Road, bridge and tunnel materials products
- classification：Road, bridge and tunnel materials
541～585 item / All 3218 items
Manage jack pressure and remotely check hydraulic and water pressure measurements without manual intervention! Quickly and safely obtain data without entering the installation site!
- Other measuring instruments
We offer a rich selection and reliable technology. With comprehensive guarantees, you can feel secure even after installation! For commercial air conditioners suitable for offices and stores, please c...
- Heating and cooling equipment and facilities
[Special Selection] Designed for Severe Winter! Commercial Air Conditioner for Cold Regions | Sumi no Mori
Even in sub-zero temperatures, management that doesn't stop. ~Proposal for upgrading to next-generation commercial air conditioners designed for cold regions~ On winter mornings, offices and stores are not warming up. Is that slight "heating loss" directly linked to decreased employee performance and dissatisfaction from important customers? If your existing air conditioner has been installed for over 10 years, it poses a "hidden management risk." The latest commercial air conditioners for cold regions have evolved from mere heating devices into powerful infrastructure that supports stable operation during winter. [Three Reasons to Recommend Cold Region Models] Overwhelming defrosting performance: Maintains performance even in low outdoor temperatures. Continuous operation technology that doesn't stop heating creates a comfortable space. Cost reduction: The latest inverter technology significantly reduces electricity costs compared to older models. Avoidance of failure risks: Prevents high repair costs and losses from business interruptions due to sudden failures of aging models. From "still working" to "replace it while you can." Shall we get through the harsh winter with reliable peace of mind and efficient cost management? If you have any questions or would like a quote, please feel free to contact us. We will fully support you in replacing your commercial air conditioner!
◆ Developing a stable supply system centered around our domestic factories ◆ High cost-performance due to processing raw materials with dry grinding! ◆ Custom-made products are also available
- Solid wood flooring/outdoor
- cement
- Paving Materials
▼▲▼▲▼▼▲▼▲▼★Mica News★Suppresses gas and moisture permeability! Mica with excellent barrier properties★Repco News★▼▲▼▲▼▼▲▼▲▼
Improved barrier properties with the curved path effect! Lightweight while suppressing vibrations! Used in various applications such as films, coatings, and adhesives! Barrier properties (Barrier effect) Suppressing the permeation of gases and moisture with the curved path effect! Delays aging and provides corrosion resistance. Used in marine coatings, films, adhesives, and interestingly, as packaging material coatings for fresh food. *We handle various sizes and grades of mica products, primarily gold mica (S grade) and white mica (M grade). Mica has good compatibility with various materials such as plastic resins, coatings, rubber, films, sealing materials, and adhesives. Feel free to contact us.
Comparing Lepcomica with other representative inorganic fillers! Talc, Wollastonite, Glass Fiber... Comparing their respective strengths and weaknesses!
- Solid wood flooring/outdoor
- Gypsum board and moldings
- Paving Materials
It is a rare filler with magnetic properties. Magnetite is used for high-density purposes, but it also has characteristics such as thermal conductivity, electrical conductivity, and magnetism.
- Soundproofing Sheet
- Bridge Materials
- Anti-vibration rubber
Magnetic Filler: Launch of the Maghemite 'Magni F' Series! High purity and high density magnetic filler 【Cost Reduction】【Magnetite】★Repco News★
We have uploaded additional information regarding MagniF. If you are considering magnetic fillers, high-density fillers, or metal-detectable fillers, please make use of it◎ 'Magni F', which is high-purity magnetite, is a natural mineral product with ferrimagnetic properties. It is a high-density filler with a true specific gravity of 5.2, excelling in magnetism, thermal conductivity, electrical conductivity, and heat retention. When utilized as a "tracer" for X-ray and induction wireless applications, it can impart metal detectability while maintaining functional characteristics, and we offer F grade specifically for food packaging applications where compliance with hygiene standards is required. It is possible to keep costs down compared to synthetic products! If you are looking for magnetic fillers, please consider us. 【Features】 ■ Environmentally friendly high-purity natural magnetite ■ Long-term supply stability due to abundant reserves ■ Damping effect on sound and vibration due to high density ■ Excellent thermal and electrical conductivity ■ X-ray and metal detectability due to ferrimagnetism For more details, please feel free to download the materials.
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Excellent compatibility with Maika! General-purpose plastic edition.
- Reinforcement and repair materials
- Paving Materials
- Decorative slate
Excellent compatibility with Repkomica! Engineering Plastics Edition
- Gypsum board and moldings
- Paving Materials
- Solid wood flooring/outdoor
We handle a variety of mica products in different sizes and grades, primarily focusing on gold mica (S grade) and white mica (M grade). Custom orders are also available!
- Gypsum board and moldings
- cement
- Bridge Materials
High aspect ratio = Lepidolite. An explanation of the aspect ratio commonly used when describing flaky, plate-like mica (mica)!
- cement
- Coating film waterproofing material/permeable waterproofing material
- Paving Materials
Repco mica, with recommended grades varying by application! There are over 10 general-purpose grades available! Custom orders are also possible!!
- Gypsum board and moldings
- cement
- Bridge Materials
The definitive version of the slit side ditch!! "Multi U ditch"
- Gutters and U-shaped gutters
We will utilize our long-standing accumulated know-how to conduct contracted analysis tailored to our customers' needs.
- Gutters and U-shaped gutters
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Examples of scan data obtained with the TI Asahi ground-based laser scanner.
- Tunnel Materials
Innovative expansion devices for bridges that extensively incorporate new mechanisms.
- Bridge Materials
Compatible with vertical drainage (T-25)! A lineup including standard type, grating drainage type, and shoulder drainage type! With construction examples included.
- Gutters and U-shaped gutters
Registered with the Ministry of Land, Infrastructure, Transport and Tourism's "NETIS" for weed prevention methods and deep groove circular ditches! Includes construction examples.
- Gutters and U-shaped gutters
Also for drainage pavement! Standard sizes range widely from 300×300 to 500×1200! Includes construction examples.
- Gutters and U-shaped gutters
We offer various products for IBC drainage ditches, including underground ditches that can be used for cross-sections! With construction examples included!
- Gutters and U-shaped gutters
It has anti-weeding functionality! Variable invert pouring is possible and it is compatible with drainage pavement! Includes construction examples.
- Gutters and U-shaped gutters
A drainage ditch installed at the boundary between the roadway and the sidewalk! The circular bottom of the waterway provides a flushing effect! Includes construction examples.
- Gutters and U-shaped gutters
This product is suitable for the guidelines for creating a safe and comfortable bicycle environment! Includes case studies.
- Gutters and U-shaped gutters
Variable invert pouring is possible! The bottom surface of the waterway is circular, which provides a flushing effect and makes it difficult for sediment to accumulate! Includes construction examples.
- Gutters and U-shaped gutters
Compatible with drainage pavement! Can utilize a wide road width, suitable for narrow roads. Also supports weed prevention functions! Includes construction examples.
- Gutters and U-shaped gutters
Variable invert pouring is possible! Ideal for locations such as national roads where a 500 mm apron width is required! Includes construction examples.
- Gutters and U-shaped gutters
Suitable for places where the outer line interferes with the apron, such as central medians! Compatible with drainage pavement! Includes construction examples.
- Gutters and U-shaped gutters
The standard size accommodates from 300×400 to 300×1500! Compatible with T-25 cross sections! Includes construction examples.
- Gutters and U-shaped gutters
Excellent sound insulation and durability. Easy maintenance after installation, effective for cost reduction! Includes case studies.
- Gutters and U-shaped gutters
Registered product of the Ministry of Land, Infrastructure, Transport and Tourism's "NETIS" / Ibaraki New Technology Information System "IT'S"! Includes construction examples.
- Gutters and U-shaped gutters
A lineup of cross-sectional products, including underground types and grating drainage types! With construction examples included.
- Gutters and U-shaped gutters
Lightweight, easy to install, and economical! Water channel flume compatible with cross-sections from 250 to 600! Includes installation examples.
- Gutters and U-shaped gutters
It has a scouring effect, making it difficult for sediment to accumulate! Variable invert pouring is possible! Includes construction examples.
- Gutters and U-shaped gutters
We offer various products such as pedestrian and vehicle boundary blocks that can be used for deep groove circular side ditches! With construction examples included.
- Gutters and U-shaped gutters
The standard sizes range from 300×400 to 300×1500! Resistant to sediment accumulation! Includes construction examples.
- Gutters and U-shaped gutters
The standard sizes range widely from 300×400 to 300×1500! The bottom surface of the water channel is circular, providing a flushing effect! Includes construction examples.
- Gutters and U-shaped gutters
Dirt and sand are difficult to accumulate! The grating can be removed, making cleaning easy! Includes construction examples.
- Gutters and U-shaped gutters
A slim product with a grating-type drainage channel! The circular bottom of the waterway provides a flushing effect! Includes construction examples.
- Gutters and U-shaped gutters
Top lifter compatible! The price is less than half that of our own grating products! Adopted for design at Sendai Freight Terminal Station! Available for delivery to other prefectures!
- Gutters and U-shaped gutters
【Safety Assurance】Outstanding visibility with a sign height of 1,100mm, one of the largest in the industry! Can also be used as a substitute for arrow boards and traffic cones.
- Road signs and road accessories
We offer various types of plastic extrusions. Please consult us for mold production, prototyping, and mass production. We also accept orders for our products.
- Tunnel Materials
2025 Good Design Award" winner! Mitsuba Drain has also been selected as "My Chosen Item.
The announcement of the 2025 Good Design Award (organized by the Japan Design Promotion Association) was made on October 15, 2025. This time, Nihon Doren Co., Ltd. received two Good Design Awards. Additionally, the focused drainage pipe "Mitsuba Doren" was selected for the special selection "My Chosen Item" by the Good Design Award judging committee. It has been highly evaluated as an excellent design that merges traditional wisdom with modern technology.
We respond to our customers' needs with skilled techniques such as plastic bending, adhesive processing, and welding.
- Tunnel Materials
2025 Good Design Award" winner! Mitsuba Drain has also been selected as "My Chosen Item.
The announcement of the 2025 Good Design Award (organized by the Japan Design Promotion Association) was made on October 15, 2025. This time, Nihon Doren Co., Ltd. received two Good Design Awards. Additionally, the focused drainage pipe "Mitsuba Doren" was selected for the special selection "My Chosen Item" by the Good Design Award judging committee. It has been highly evaluated as an excellent design that merges traditional wisdom with modern technology.
Can accommodate various terrains and structures! Leak-proof gutters made of non-combustible materials.
- Tunnel Materials
2025 Good Design Award" winner! Mitsuba Drain has also been selected as "My Chosen Item.
The announcement of the 2025 Good Design Award (organized by the Japan Design Promotion Association) was made on October 15, 2025. This time, Nihon Doren Co., Ltd. received two Good Design Awards. Additionally, the focused drainage pipe "Mitsuba Doren" was selected for the special selection "My Chosen Item" by the Good Design Award judging committee. It has been highly evaluated as an excellent design that merges traditional wisdom with modern technology.
Improving the durability and workability of leak-proof gutters! Soft P.V.C. gutters made from flexible materials.
- Tunnel Materials
2025 Good Design Award" winner! Mitsuba Drain has also been selected as "My Chosen Item.
The announcement of the 2025 Good Design Award (organized by the Japan Design Promotion Association) was made on October 15, 2025. This time, Nihon Doren Co., Ltd. received two Good Design Awards. Additionally, the focused drainage pipe "Mitsuba Doren" was selected for the special selection "My Chosen Item" by the Good Design Award judging committee. It has been highly evaluated as an excellent design that merges traditional wisdom with modern technology.
The most weather-resistant reinforced glass curved mirror, with a mirror surface that has high affinity with water, allowing rainwater to wash away dirt, keeping it clean for a long time and making ma...
- Road signs and road accessories
Finish the concrete surface in an optimal condition! Angle adjustment of the float pan is possible!
- Paving Materials
A concrete finisher that is easy to handle, achieving reduced construction time and improved construction quality!
- Paving Materials
For general drainage ditches such as on-site casting. Additionally, for drop-in type grates, drainage covers, and drainage covers with special dimensions.
- Grating
The new "2024-2025 Comprehensive Catalog" has been released! New grating products included!
The new "2024-2025 Comprehensive Catalog" from Okagreat Co., Ltd. has been released! It features many original products and grating, including "Safety Walker" and "OG Lock U"! New types of grating such as "Safety Walker," "OG Lock U," "Premium Expand," and "Neo Slit" OG Super High Tensile High Strength Stainless Steel Grating "Fine Grate" are included. Many original products and gratings are featured! If you're looking for something a bit different from conventional grating, something you've never seen before, or grating that better matches the landscape, you might find it in this catalog. High heels and canes won't get stuck. Trash and small stones won't clog. Slip-resistant effects are expected. Theft prevention. Prevents wobbling, and tires from road bikes or sports-type bicycles won't fit, nor will the wheels of carts, carry cases, or hand trucks, and so on. This catalog addresses your grating concerns. If you would like a copy of the new "2024-2025 Comprehensive Catalog," please feel free to contact us.