Iwaki, Japan

nedzi

High-Quality Hot-Forged Bolt MFG. Co., Ltd.

We deliver "Relief" and "Trust".

ESTABLISHED IN
1943

Ryuichiro Sekiguchi,

PRESIDENT & CEO OF TOHOKU BOLT MFG. CO., LTD.

“It's just a bolt(nedzi),
but it's a bolt(nedzi).”

We aim to continue providing the value of "relief" and "trust" to our customers and society through threads. Our mission is to contribute to society by further enhancing our value both domestically and internationally.

Founded in 1943 as a bolt factory for the coal mining industry, we have evolved to support social infrastructure such as high-speed railways, tunnels, bridges, and energy plants.

Moving forward, we will continue to enhance our technical expertise and proposal capabilities while pursuing employee well-being and sustainable corporate growth.

Company Creed

Sincerity, Effort, Cooperation

Products with Soul

From M16 to M110. Highly regarded both in Japan and overseas, we produce critical fastening components for global infrastructure.

Energy & Plant Sector

Specialized bolts for Wind Power Generation and critical energy infrastructure.

Wind Power Generation Bolts
Tower Joint Bolts / Anchor Bolts

Railway & Infrastructure

Founding expertise in rail fastening components for high-speed railways and transport networks.

Dog Spikes / Rail Screws
TN Hook Bolts / Fish Plate Bolts

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MFG Excellence & Nedi Lab

Our integrated manufacturing system ensures full traceability. The "Nedi Lab" excels in Fractography to provide root-cause analysis and design optimization.

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