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Tokyo Tanso Co. Ltd., originally a carbon brush maker, was established in 1947. Ten years later, in 1957, after moving the factory from Kojiya to Shinagawa, founder, Ishiko Yamazaki focused on machining electrodes and furnace parts to expand the business. In 1985, Tokyo Tanso expanded its machining capabilities by acquiring/ moving to a bigger land in Yachimata, Chiba prefecture.

Today, using our CNC (Computer Numerical Control) machines, we specialize in processing materials such as graphite, various impregnated carbon, c/c composites, carbon fiber, carbon insulator and machinable ceramics. We can provide our customers with a complete and cost-effective supply solution.

CNC aided by CAD/CAM (Computer Aided Design/ Computer Aided Manufacturing) software & manual machining operations are the backbone of our machine shop accomplished by our well-trained and experienced machinists. Our staff is technically competent, experienced, production-ready for short run orders, prototypes as well as complex assemblies and quantity production. We can work from broken parts or freehand sketches to provide the parts our customers’ desire. We partner with customers and work closely to produce the highest quality parts at the best possible price. We have earned a reputation based on pricing by fulfilling requirements for precision, accuracy, quality, value and flexibility.

Our focus is on exceeding the needs of our customers in various industries:
・Aircraft & Aerospace
・Incinerator/Industrial furnaces
・Electrical & Electronic
・Medical & Surgical
・Military & Defense

Whether the quantities are prototype or volume production, our combined 70 years of experience and broad range of equipment has the capabilities of meeting our customers’ most demanding needs…micro, large, thick, thin, 3D and precision.


C/C composites
Impregnated carbon
Carbon fiber
Carbon insulator
Machinable ceramics


Rapid lead time
Prototype and volume production
Able to purchase various brands of graphite materials domestic and overseas companies
Variety of coatings


Address: 3-4-11 Shimbashi, Minato-ku, Tokyo 105-0004 Japan

Phone: +81-3-3591-624 (Contact: Yamazaki)


Monday-Friday 9AM-6PM JST

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