― Corporate Philosophy

MITSUBISHI
STEEL GROUP
PHILOSOPHY

01

Customer First

We are committed to supplying our customers with products of superior quality and features in response to their needs while continuing to strive for more competitive costs and improved customer services.

02

Development of New Technology

We focus on manufacturing excellence with a competitive edge in the global market while pursuing more advanced technology.

03

Maximizing Human Capital

We are committed to creating a pleasant and vigorous work environment, embracing a diverse workforce with various talents to achieve their full potential.

04

Challenge for the Future

We welcome any challenge with passion and creativity to respond confidently to ever-changing world markets.

05

Contribution to Society

Our management that is based on compliance contributes on progress of society through the business activities with environmental consideration.

Company Profile

Company Name
PT Jatim Taman Steel Manufacturing
Established
1971
Head Office
Sidoarjo, East Java, Indonesia
Share Capital
¥199 Billion (IDR 2,209 Billion)
(As of April 2023)
Employees
893 (As of January 2026)
Company Photo

Board of Directors

President Director
Takashi Numakawa
Director
Terumichi Yamamoto
Director
Shogo Ujiie
Director
Bob Budiono
Director
Junya Shibata
Ownership Structure

History

Corporate History

Certification

PT Jatim Taman Steel Manufacturing continuously maintains international quality standards through various certifications including ISO, JIS, SNI and Green Industry Certification.

These certifications demonstrate our commitment to quality, environmental responsibility and continuous improvement in every production process.

ISO9001

ISO 9001:2015

ISO14001

ISO 14001:2015

INDUSTRI HIJAU
Green Certificate
Green Industry Certification グリーンインダストリー認証