50 years of silver alloy welding technology and precise machining technology from Hachiyoo Inc will provide full satisfaction to your complicated demands toward devices for high frequency microwave communication tools.

Silver alloy welding

Since our establishment, our silver alloy welding technologies are growing fast with process of producing high quality waveguides. We receive good evaluations from customers in Japan. Those waveguides are used for high-frequency microwave communication equipment.

Precision Machining

Our rationalization of process using a machining center and ideas of improvement are also vital facts for providing burr-free, highly precise, and high quality radio frequency components. This technology also supports for various alloys, such as aluminums, copper tungsten, casted and forged parts.


Even if you are sending inquiries from overseas, we provide simple steps to satisfy your demands.

  • send us your inquiry

    from the form below, kindly send us your inquiry.

  • Reply over the phone

    We shall discuss about what is your inquiry about in detail over the phone.


    let us design what we can do to your demand.

  • Production

    Depending on your inquiry, it might will be take some time.

  • delivery

    we will deliver to your location


5-3-5 Jindaiji Higashi-Machi, Chofu-shi, Tokyo 182-0012

+81 (42) 486 0622

+81 (42) 483 6946


About Us

Company Outline
Company Hachiyoo Inc.
Address 5-3-5 Jindaiji Higashi-Machi , Chofu-shi , Tokyo 182-0012
Tel/Fax Number 042-486-0622 / 042-483-6946
URL http://www.hachiyoo.com
Establish September , 1964
Capital (M yen) 11.2
Sales(M yen) 437
Employees 28
Name of Representative Koizumi Nobumasa
Person in charge Koizumi Nobumasa
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