Company
Securing the world’s infrastructure with the pride of "NEDI" — supporting leading roles from behind the scenes since 1943.
TOHOKU BOLT WAY
Our Mission
"It's just a bolt, but it's a bolt." Through our fastening technology, we deliver "relief" and "trust" to society. We aim to contribute to a better future by enhancing our technical value globally.
To the safety of infrastructure and the local community.
Constant technical advancement in hot-forging technology.
For the happiness and growth of our employees.
Company Profile
| Company Name | Tohoku Bolt (Nedzi) MFG. Co., Ltd. |
|---|---|
| Founded | October 18, 1943 |
| Incorporated | September 16, 1950 |
| Representative | Ryuichiro Sekiguchi, CEO |
| Capital | 18 million yen |
| Main Banks | Toho Bank (Izumi Branch), Joyo Bank (Iwaki Branch), Shoko Chukin Bank (Iwaki Branch) |
Corporate History
The Beginning
Established as "Coal Mine Equipment Manufacturing Cooperative Bolt Factory" in Iwaki, Fukushima, to support local energy infrastructure.
Incorporation & JIS Certification
Reorganized as "Tohoku Bolt MFG. Co., Ltd." in 1950. Obtained JIS certification for Hex Bolts (1954) and Joint Plate Bolts (1957).
Expansion of Network
Opened Tokyo and Sendai Sales Offices (1971). Relocated Headquarters to the current location (1973) and opened Koriyama Sales Office (1975).
ISO Certification
Obtained ISO 9002 (2002) and transitioned to ISO 9001 (2003), establishing a global standard for quality management.
Resilience After Earthquake
Demonstrated remarkable resilience by resuming operations within only three days after the Great East Japan Earthquake.
Innovation & Recognition
Selected as one of the "300 Outstanding SMEs" (2015). Designated as a "Regional Future Leading Company" (2017) and expanded with a second factory (2021).
Excellence in Management
Obtained ISO 14001 and 45001 (2022). Certified as a "Health and Productivity Management Organization" and "Eruboshi (Stage 2)" (2024).
Tokyo Headquarters Relocation
Relocated the Tokyo Sales Office to its current location as the Tokyo Headquarters, strengthening our global business presence.
SDGs Initiatives
We are committed to these 10 goals for a sustainable future.
Official Certifications & Awards
Selected: Dec. 2017
Regional Future Leading Company (by METI)
Certified: 2024 / 2025
Health & Productivity Management Organization
Certified: Jul. 2024
"Eruboshi" (Stage 2) Certification
Certified: Jan. 2025
Excellence in Work-Life Balance Support
Technical Assets
Patents & Innovation
- • Patent No. 002405: Rail first aid unit of connecting track
- • Patent No. 162256: Removable underground pipe
Academic Contributions
Technical presentations at JSME and joint development with major infrastructure partners.