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  3. KOYAMA CO., LTD. Head office, Tochigi branch, Tokyo branch, Kawasaki branch, Shizuoka branch, Osaka branch, Nagareyama local office, 4 overseas local companies (the Philippines, Shanghai, Hong Kong, Vietnam)
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KOYAMA CO., LTD. Head office, Tochigi branch, Tokyo branch, Kawasaki branch, Shizuoka branch, Osaka branch, Nagareyama local office, 4 overseas local companies (the Philippines, Shanghai, Hong Kong, Vietnam)

EstablishmentDecember 26, 1957
capital3000Ten thousand
number of employees100
addressTokyo/Shinjuku-ku/2-5-2 Hyakunincho
phone03-3363-3711
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last updated:Nov 20, 2025
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KOYAMA CO., LTD. Company Overview

"Do you have screws that are difficult to slip? I would like to request sheet metal processing. Can you make molded products?" We will solve your manufacturing-related problems!

Our company is a specialized trading firm that handles a wide range of products related to manufacturing, centered around "screws." We offer not only tools, carts, and standard screw products but also processed and drawing items made of metals, plastics, and harnesses. Additionally, we handle various types of transport robots such as AGVs and AMRs. Since our establishment in 1957, we have been engaged in transactions with many suppliers both domestically and internationally. Our strengths lie in our reliable quality, competitive pricing, and speedy responsiveness. In addition to our headquarters in Tokyo, we have branches in Kawasaki, Tochigi, Shizuoka, Osaka, the Philippines, Vietnam, Shanghai, and Hong Kong, where our sales representatives provide consistent support from quotations to after-sales follow-up. We also have a subsidiary, Tokai Lock Co., Ltd., which specializes in anti-loosening processing for screws. We will provide optimal proposals tailored to your needs, so if you have any issues related to manufacturing, please feel free to contact Koyama Co., Ltd.

Business Activities

Development and sales of screws, cold-formed parts, springs and pressed parts, precision machined parts, adhesives, sealants, machine tools, labor-saving equipment, precision molded products, electrostatic discharge protection products, and environmental improvement products. The wholly-owned subsidiary "Toka Lock Co., Ltd." offers screw locking processing.

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Products/Services (99)

Heat Stroke Prevention for Manufacturing Industry: Dual Cooling Fans product image
Heat Stroke Prevention for Manufacturing Industry: Dual Cooling Fans
Heat Stroke Prevention for Construction Sites: Dual Cooling Fans product image
Heat Stroke Prevention for Construction Sites: Dual Cooling Fans
We've eliminated the weaknesses of air-conditioned clothing! Heatstroke prevention with dual cooling fans. product image
We've eliminated the weaknesses of air-conditioned clothing! Heatstroke prevention with dual cooling fans.
【Support from prototype to mass production】Titanium bolts (fully threaded type) product image
【Support from prototype to mass production】Titanium bolts (fully threaded type)

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catalog(50)

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Basic Safety Course on Site: Your "Close Call" Can Save Your Colleagues — The First Step in Accident Prevention Learned from Near Misses — (English Version)

Basic Safety Course on Site: Your "Close Call" Can Save Your Colleagues — The First Step in Accident Prevention Learned from Near Misses — (English Version)

TECHNICAL
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On-site Safety Basics Course: Your "Close Call" Can Save Your Colleagues — The First Step in Accident Prevention Learned from Near Misses —

On-site Safety Basics Course: Your "Close Call" Can Save Your Colleagues — The First Step in Accident Prevention Learned from Near Misses —

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Air Stretcher Comprehensive Catalog

Air Stretcher Comprehensive Catalog

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Air stretcher installation platform

Air stretcher installation platform

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news(11)

スクリーンショット 2026-06-24 155841.png

Basic Case 10 of On-Site Safety: Your "Close Call" Saves Your Colleagues — The First Step in Accident Prevention Learned from Near Misses —

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Aren't you just ending it with "that was close"? It is said that many serious accidents in factories occur after numerous near-miss incidents. This document carefully selects and introduces examples of near-miss incidents commonly seen in manufacturing sites such as machining, sheet metal processing, assembly, logistics, and equipment maintenance. It clearly explains possible incidents and countermeasures that can occur in actual workplaces, making it useful as safety education material. We encourage you to download it and use it to enhance or review the basics of your company's safety activities. There are two versions available (Japanese and English): - Basic Safety Course: Your "near-miss" can save your colleagues — The first step to accident prevention learned from near-miss incidents — - Basic Safety Course: Your "near-miss" can save your colleagues — The first step to accident prevention learned from near-miss incidents — (English version) *This document is created with general manufacturing industry labor safety and environment in mind. *For specific individual cases or special environments, please confirm with your labor safety officer or internal labor safety committee before use.

Jun 24, 2026

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カナリアPlus2026年モデル.jpg

Get ahead of the intense summer heat! "Heat Stress Countermeasure Watch Canary Plus 2026"

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After the cherry blossom viewing, the rainy season begins, and before you know it, summer arrives. This summer is also predicted to be extremely hot. Just the other day, our company shipped about 1,500 heatstroke prevention devices to a certain local government. Last year, measures against heatstroke became mandatory, so please consider your options before various products become scarce this year. As the primary distributor for Trusco Nakayama Co., Ltd., we offer a variety of products at reasonable prices. Please feel free to contact us. Koyama Co., Ltd. Development Sales Department ☎03-3363-3711

Apr 01, 2026

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Specializing in screw loosening prevention processing, "Tōkai Lock Co., Ltd." has had a strong start two months after opening!

  • COMPANY

Tokai Rock, a group company of Koyama Co., Ltd. located in Numazu City, Shizuoka Prefecture, relocated its headquarters and factory at the end of last year and is now operating at full capacity with new equipment. At Tokai Rock, we protect our customers' screws from "loosening" and "deflection" over time by applying adhesive to the screw parts. We accommodate small lots, a variety of products, and short delivery times. Additionally, as a certified factory of the major adhesive manufacturer Henkel, we provide comprehensive support for environmental surveys and material certifications. Please feel free to contact the Development Sales Department of Koyama Co., Ltd. at ☎03 (3363) 3711.

Feb 20, 2026

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Detailed information

Company name KOYAMA CO., LTD. Head office, Tochigi branch, Tokyo branch, Kawasaki branch, Shizuoka branch, Osaka branch, Nagareyama local office, 4 overseas local companies (the Philippines, Shanghai, Hong Kong, Vietnam)
number of employees100
Contact addresspostalcode 169-0073 Tokyo/ Shinjuku-ku/ 2-5-2 HyakuninchoView on map TEL:03-3363-3711 FAX:03-3362-5560
Key PartnersToshiba Corporation and its group companies Hitachi, Ltd. and its group companies Panasonic Corporation and its group companies Mitsubishi Electric Corporation and its group companies SMC Corporation Meidensha Corporation Otis Elevator Company Japan Omron Corporation Seiko Epson Corporation and its group companies Olympus Corporation and its group companies Evident Corporation Ricoh Company, Ltd. and its group companies Fuji Xerox Co., Ltd. Furukawa Battery Co., Ltd. Nidec Corporation and its group companies Nihon Hassho Co., Ltd. Achilles Corporation Sekisui Plastics Co., Ltd. A&D Company, Limited and its group companies Yokogawa Electric Corporation Mitsubishi Steel Manufacturing Co., Ltd. France Bed Co., Ltd.
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Industry Trading company/Wholesale
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