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Company Database


about this company


Toyosu Prime Square, 5-6-36 Toyosu, Koto-ku, Tokyo 135-0061, Japan

Company Contact Email:



Proterial Group, Consolidated: 26,496


¥310 million(as of end of March 2023)


Proterial Group, Consolidated: ¥1,118.9 billion

Introduction of your company & business:  

Proterial is a material manufacturer with highly competitive core technologies for high-performance materials. With the world's top brands in its portfolio, Proterial engages in a broad range of businesses in the markets related to industrial infrastructure, automobiles, and electronics.

Our business foundations are broad, and our business structure is always responsive to the wide-ranging needs of society. This blend of technologies has been the driving force behind the Proterialʼs growth.


Mission: “Make the best quality available to everyone”

Vision: “Leading sustainability by high performance”

Values: “Unfaltering integrity” and “United by respect”


1910: Founded as Tobata Foundry Co.

1937: Merged with Hitachi, Ltd.

1956: Established separately as Hitachi Metals Industries, Ltd.

2023: Company separated from the Hitachi Group, and renamed from Hitachi Metals, Ltd. to Proterial, Ltd.

Key Products or Services:

Manufacture and marketing of Specialty Steel, Rolls, Automotive Casting, Piping Components, Magnetic Materials, Power Electronics Materials, Electric Wire & Cable, and Automotive Components

Factory Equipment:

Japan (9 works and 4 R&D bases in Osaka, Tottori, Shimane, Mie, Saitama, Tochigi and Ibaraki), USA, China, Thailand, India, Philippins, Korea etc.

Technology / R&D activities:

The Global Research & Innovative Technology center (GRIT) is a Corporate Research Lab of Our Company.

Proterial Group continuously invests in R&D on advanced materials that contribute to sustainable growth and social contribution, particularly in regard to strengthening the creation of new businesses and products that contribute to an environmentally friendly society. At the same time, we are shortening the development period by utilizing digital technologies such as AI and materials informatics.

International Operations:

New York, Dusseldorf, London, Paris, Shanghai, Hong Kong, Taipei, Singapore and other cities