Verified Nov 2026
Metal Fabrication
·
Koto City, Tokyo
·
Since 1910
Proterial, Ltd. is a metal fabrication and materials manufacturer headquartered in Koto City, Tokyo, Japan, and founded in 1910. It has an estimated workforce of 10,000 to 50,000 people and an estimated revenue of $1 to $5 billion. The company is privately held and serves the automotive, electric vehicle, electronics, renewable energy, industrial equipment, and aerospace sectors. Its product range includes specialty steel, magnetic materials, and electronic components. In February 2026, the company announced plans to establish a production site in India for its Metglas amorphous metal material, citing energy-saving demand.
Proterial, Ltd. at a glance
Revenue
$1-5B
Est. band
Employees
10,000-50,000
Founded
1910
Headquarters
Koto City, Tokyo
Certifications
IATF 16949 · ISO 13485 · ISO 14001
Import activity
4944
Industries
Automotive
Electric Vehicles
Electronics
Renewable Energy
Industrial Equipment
Aerospace
Sourcing and import activity
From US customs bill-of-lading records
US sea imports
4944
Named foreign suppliers
23
Top origins
South Korea · Japan · China · Taiwan
Shared foreign counterparties do not establish that these companies buy from Proterial, Ltd..
What this tells a buyer
Proterial announced in February 2026 that it would invest about $77 million in India to produce metal for transformers, according to Nikkei Asia.
The company's product listings include steel, rubber, aluminum, electronic, and machining-related items, and it holds IATF 16949, ISO 13485, and ISO 14001 certifications.
Proterial is a private company that separated from the Hitachi Group and was rebranded in January 2023, and Bloomberg reported in August 2026 that its owner, Bain, was seeking $1.3 billion from a sale of the firm.
Source: US customs bill-of-lading records and public filings · Last verified Nov 05, 2026
STABILITY SIGNALS
Established & active
116 years in operation (founded 1910).
Holds IATF 16949, ISO 13485, ISO 14001 certification(s) per public sources.
Overview
Proterial, Ltd. is a metal fabrication and materials manufacturer headquartered in Koto City, Tokyo, Japan, and founded in 1910. It has an estimated workforce of 10,000 to 50,000 people and an estimated revenue of $1 to $5 billion. The company is privately held and serves the automotive, electric vehicle, electronics, renewable energy, industrial equipment, and aerospace sectors. Its product range includes specialty steel, magnetic materials, and electronic components. In February 2026, the company announced plans to establish a production site in India for its Metglas amorphous metal material, citing energy-saving demand.
At a glance
Attribute | Detail |
|---|---|
Founded | 1910 |
Headquarters | Koto City, Tokyo |
Employees | 10,000-50,000 |
Revenue | $1-5B (estimated) |
Primary capability | Metal Fabrication |
Certifications | IATF 16949 · ISO 13485 · ISO 14001 |
What Proterial, Ltd. makes
The company's product listings include steel, rubber, aluminum, electronic, and machining-related items, and it holds IATF 16949, ISO 13485, and ISO 14001 certifications.
Products and capabilities described on the company's own site include Steel, Emissions, Brake, Assembly, Mold, Electronics, Rubber, Aluminum, Machining, Sub-Assembly (source: proterial.com).
Certifications
Proterial, Ltd. is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
IATF 16949 — proterial.com
ISO 13485 — proterial.com
ISO 14001 — proterial.com
Trade and customs footprint
Proterial announced in February 2026 that it would invest about $77 million in India to produce metal for transformers, according to Nikkei Asia. US customs bill-of-lading records list 4944 inbound shipments across 23 foreign suppliers, with top origins including South Korea · Japan · China · Taiwan.
Latest developments
2026-10-05 — 2026 | Proterial, Ltd. (proterial.com)
2026-09-09 — Daido Steel and Proterial Begin Joint Long-Distance Round-Trip Transportation with Modal Shift | Proterial, Ltd. (proterial.com)
2026-08-19 — Bain Unit Proterial Seeks $1.3 Billion From Japan Firm Sale - Bloomberg (bloomberg.com)
2026-02-27 — Proterial to Establish a Production Site for Amorphous Metal Material Metglas™ in India Addressing Growing Energy-Saving Needs | Proterial, Ltd. (proterial.com)
2026-02-26 — Japan's Proterial to invest $77m in India to make metal for transformers - Nikkei Asia (nikkei.com)
2026-02-12 — Proterial Introduces Captive Use Solar Power Generation Equipment with Approximate Total Output of 8 MW at Chinese Bases | Proterial, Ltd. (proterial.com)
Company details
Proterial is a private company that separated from the Hitachi Group and was rebranded in January 2023, and Bloomberg reported in August 2026 that its owner, Bain, was seeking $1.3 billion from a sale of the firm. Proterial, Ltd. was founded in 1910, has an estimated 10,000-50,000 employees, and is headquartered in Koto City, Tokyo. On the LightSource stability read it is rated "Established & active": 116 years in operation (founded 1910). Holds IATF 16949, ISO 13485, ISO 14001 certification(s) per public sources.
Frequently asked questions
What does Proterial, Ltd. make?
Proterial, Ltd. is a metal fabrication and materials manufacturer headquartered in Koto City, Tokyo, Japan, and founded in 1910. It has an estimated workforce of 10,000 to 50,000 people and an estimated revenue of $1 to $5 billion. The company is privately held and serves the automotive, electric vehicle, electronics, renewable energy, industrial equipment, and aerospace sectors. Its product range includes specialty steel, magnetic materials, and electronic components. In February 2026, the company announced plans to establish a production site in India for its Metglas amorphous metal material, citing energy-saving demand.
Where is Proterial, Ltd. headquartered?
Proterial, Ltd. is headquartered in Koto City, Tokyo.
When was Proterial, Ltd. founded?
Proterial, Ltd. was founded in 1910.
How big is Proterial, Ltd.?
Proterial, Ltd. has an estimated 10,000-50,000 employees, with revenue in the $1-5B range (estimated).
What certifications does Proterial, Ltd. hold?
Proterial, Ltd. lists IATF 16949 · ISO 13485 · ISO 14001 on its website. Confirm the certified scope for the specific plant producing your part.
Does Proterial, Ltd. import from overseas suppliers?
US customs bill-of-lading records show 4944 inbound shipments for Proterial, Ltd., with top origins including South Korea · Japan · China · Taiwan.
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Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Phone
+1 914-694-9200
Certification
IATF 16949 · ISO 13485 · ISO 14001
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