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A Leading Transmission System Manufacturer

We provide international-standard high-precision gear products.

Product Information

We provide international-standard high-precision gear products used in various industrial infrastructure
such as power generation equipment, cement mills, and cranes.

News

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Website Renewal
We renewed the website of Sumitomo Heavy Industries Gearbox Co., Ltd. We will provide you with more...
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Business Integration
On April 1, 2017, we, Sumitomo Heavy Industries Gearbox Co., Ltd(Kaizuka Factory), were integrated...
100周年のお知らせ
100th Anniversary
We founded as the Osaka Seisasho Co., Ltd., a chain manufacturing company in September 1916. After...
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Change in Company Name
We founded as the Osaka Seisasho Co., Ltd. in September 1916, and thanks to your support, we passed...
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About Us

We are a "A Leading Transmission System Manufacturer" that has been manufacturing international-standard high-precision gear products for 100 years since our establishment.

Our gears are used in all fields such as power generation equipment that support lifelines, large mills that grind cement, river pumps, and machinery and equipment for steelmaking and plastics as the most efficient large power transmission systems. As an unsung hero that support the industrial foundation, we have earned a top-class share in Japan.

Our products & service have expanded into the global market through cooperation with the global network of Sumitomo Heavy Industries Group.