光和商事株式会社 List of Products and Services

The "PA Joint" is a buried expansion device that does not require secondary water stopping and possesses seismic resistance due to its ability to expand and contract in all directions, 360 degrees. It exhibits better performance against temperature fluctuations and can accommodate a maximum expansion of up to 100mm. Additionally, the ground cover can be constructed with the same material, allowing for seamless water stopping. 【Features】 ■ Wheel tracking test: 52,500 rotations/mm ■ Durability performance several times greater than the heavy traffic standard value of 3,000 rotations/mm ■ No need for secondary water stopping; also achieves seismic resistance ■ Ground cover can also be constructed with the same material ■ Exhibits the same expansion and contraction performance in all 360 degrees *For more details, please refer to the PDF document or feel free to contact us.

"GeoBest" is a weakly alkaline soil pavement solidifying agent primarily composed of magnesium oxide that does not use cement. Japanese soil can be broadly classified into five types, and this product can solidify all types of soil. Additionally, acute toxicity tests on killifish and rats have been conducted regarding its components and pH value, confirming its safety. 【Features】 ■ Environmentally friendly ■ Weed prevention effect ■ Excellent solidification performance ■ High aesthetic quality that preserves the texture of the soil ■ Excellent walkability due to moderate elasticity *For more details, please refer to the PDF materials or feel free to contact us.

The "Hinodakutairu Joint α" features a bolt fastening structure that significantly reduces installation time during replacement, allowing for efficient replacement. The main body is made of Hinodakutairu cast iron, which possesses strength and ductility considering the loads and impacts from vehicle traffic. The semi-circular shape helps to distribute part of the vehicle load, thereby reducing the occurrence of asphalt pavement sinking and ruts. 【Features】 ■ Easy to replace bolt fastening structure ■ Product shape that reduces step differences during vehicle traffic ■ Main body made of Hinodakutairu cast iron with excellent material properties ■ Slip-resistant structure that allows for safe travel even in rainy conditions ■ Water-stopping rubber with excellent deformation followability *For more details, please refer to the PDF document or feel free to contact us.

This catalog introduces the "soundproof products" manufactured by Shinko Kenzai Kogyo Co., Ltd., which are handled by Kowa Shoji. It features various products, including the sound-absorbing panel "Eco-Qon" made from fine porous aluminum foil, the "translucent panel" standardized based on specifications from NEXCO companies, and the "Silence Keeper" with a simple and sharp design. Please make use of this when selecting products. [Contents (excerpt)] ■ Eco-Qon ■ Unified Type ■ Translucent Panel ■ Silence Keeper ■ Related Products *For more details, please refer to the PDF materials or feel free to contact us.

The "GR Series" is a product that not only meets the drainage performance required of grating but also possesses long-term durability and high safety as a structure installed on the road. Furthermore, it takes into consideration the workability for maintenance tasks such as inspection and cleaning, and it excels in economic efficiency from a long-term perspective. We offer a lineup that includes "GR-L" for L-shaped rainwater catch basins, "GR-U" with a cast iron integrated structure, and "GR-V" for longitudinal ditches. 【Features】 ■ Drainage performance ■ Long-term durability ■ High safety ■ Consideration for workability in maintenance tasks such as inspection and cleaning ■ Excellent economic efficiency from a long-term perspective *For more details, please refer to the PDF document or feel free to contact us.

This document contains information about the "components of the drop shaft." The drop shaft construction method is a groundbreaking technique developed in collaboration with the Japan Sewerage New Technology Promotion Organization, which allows for efficient treatment of high drop heights. The main features include the reduction of manhole cross-sectional area, improved durability, enhanced maintenance environment, reduced air entrainment in main lines and storage pipes, decreased total costs, shortened construction periods, and improved workability, demonstrating advantages over conventional methods. [Contents] ■ Components of the drop shaft *For more details, please refer to the PDF document or feel free to contact us.*

The "Borkurei Mat (Bentonite Waterproof Sheet)" is an environmentally friendly waterproof sheet made from natural sodium-type bentonite sourced from Wyoming, USA. It is widely used as a waterproofing material for biotopes, ponds, and waste final disposal sites. Due to its natural material (inorganic), it is expected to provide stable waterproofing performance over the long term, and pinholes are prevented from leaking due to expansion. It can be used as a waterproof layer in various applications such as ponds, final disposal sites, and rivers. 【Features】 ■ Excellent waterproofing properties ■ Semi-permanent durability ■ Damage-resistant self-repairing properties ■ Needle punching to prevent loss and uneven distribution ■ Environmentally friendly natural bentonite *For more details, please refer to the PDF document or feel free to contact us.

"Towards a Circular Society: Easy Eco Activities You Can Do at Home" This is our company's home-use worm composting container. Worm composting utilizes the power of earthworms and microorganisms to ferment and decompose kitchen waste (organic matter) without producing unpleasant odors, creating high-quality compost in the most natural way possible. Kitchen scraps such as peels, damaged parts, and leftovers, which may have an odor, are not "waste" but originally nutritious food and resources. The excrement of earthworms is rich in components such as amino acids, phosphoric acid, nitrogen, calcium, magnesium, minerals, and enzymes, making it ideal for soil improvement. When mixed into the soil, it contributes to the safe and delicious growth of vegetables. "From Waste to Organic Compost" Because they are living creatures, earthworms connect to emotional education and make it enjoyable to continue this practice. The actions of each individual can change the community and the future. For the important children who will carry on the future, why not start a nature-friendly cycle? We will continue to face environmental issues head-on and develop new businesses as a company that is kind to the Earth.

The "BI Block" is a self-supporting large block used for soil retention and slope protection in road construction, riverbank protection, and other applications. It is a large block of the dry-stacked type that eliminates the need for core concrete, improving work efficiency and shortening construction periods. Additionally, because it is a large block, it can be installed by ordinary workers without the need for stonemasons. 【Features】 ■ Dry-stacked type large block (1.125m² per unit) ■ Excellent workability as there is no need to pour core concrete ■ Despite being a large block, it is completely self-supporting, allowing for shortened construction periods ■ Being a large block, it can be installed by ordinary workers without the need for stonemasons ■ Equipped with protrusions that have sufficient performance against soil pressure *For more details, please download the PDF or feel free to contact us. 【Service Area】Hiroshima Prefecture, Okayama Prefecture, Yamaguchi Prefecture, Shimane Prefecture, Tottori Prefecture