Our business
Tamayakin offers heat treatment services on a contract basis at two plant locations; Tokyo (Japan) and Dalian (China).
At both locations, we offer heat treatment for a variety of processes, ranging from general machine parts to aircraft parts, under high-level quality assurance system.
Tamayakin’s plant in Japan deals with a variety of process needs, ranging from small lots and prototype to high-volume production while the plant in China excels at mass production.
What Tamayakin can do
Our business
Tamayakin offers heat treatment services on a contract basis at two plant locations; Tokyo (Japan) and Dalian (China).
At both locations, we offer heat treatment for a variety of processes, ranging from general machine parts to aircraft parts, under high-level quality assurance system.
Tamayakin’s plant in Japan deals with a variety of process needs, ranging from small lots and prototype to high-volume production while the plant in China excels at mass production.
Heat treatment services
offered by Tamayakin
There is a large variety of metals around us to play different roles and support our life and society.
In recent years, Tamayakin has focused on heat treatment on aircraft parts, becoming one of the hard-to-find heat treatment plants in the world that has acquired a number of certificates for aircraft parts, including a worldwide certificate, Nadcap.
By virtue of the sizable human resources in the quality assurance system and R&D departments that are almost comparable with the number of plant workers, we enjoy a favorable reputation of the quality of our products, technology, and an ability in new business development.
Contributing to the local machinery industry
While possessing technologies that play a vital role in the fields of global aviation, space, and defense, we remain deeply rooted in the industries of the Tama region. Walking alongside local companies and valuing the trust we have built together, we continue to serve as a technology partner connecting the region and the world.
Heat treatment as Tamayakin’s core business
Our strength lies in our broad capabilities
across the aerospace, space, and defense sectors.
Aerospace-certified furnaces
| vacuum furnace | 6 units |
| carburizing furnace | 4 units |
| nitriding furnace | 4 units |
| Aluminum solution heat treatment / aging furnace |
2 units |
| Material conditioning furnace |
１unit |
| Atmosphere tempering furnace |
５ units |
Inspection equipment
| hardness tester | ７units |
| metallurgical microscope | 2 units |
| conductivity meter | ２ units |
Reliability of
Tamayakin’s
heat treatment services
Heat treatment is one of the important processes that could adversely affect human life depending on the product quality. Therefore, this process is designated as a “special process” that requires validation of the process. Moreover, acquisition of certificates through process check is demanded in many occasions. Especially in manufacturing of aircraft parts, the certificates are considered as very important part in the evaluation.
Tamayakin has acquired many different certificates that are required in the aircraft industry.
Major certificates acquired from external agencies
Acquired 1999
ISO 9001 quality management system
Obtained in 2009
JIS Q 9100 Quality management system for aerospace
Obtained in 2012
Nadcap International Aerospace Industry Special Process Certification
Obtained in 2016
Heat treatment of Rolls-Royce engine components
Acquired 2024
ISO 9001 quality management system
Obtained in 2024
JIS Q 9100 Quality management system for aerospace
Obtained in 2025
Nadcap International Aerospace Industry Special Process Certification
Initial acquisition of ISO14001
2015 Environmental management system in 2010
Initial acquisition of ISO9001
2015 Quality management system in 2010
Initial acquisition of IATF16949
16949：2016 Quality management system for automobile industry in 2010
Initial acquisition of AS 9100D
Quality management system for aerospace in 2019Initial acquisition of Nadcap
Heat Treating Special process certificate for international aerospace industry.
Tamayakin’s technical
specifications
Parts required for aircraft, space equipment, and defense systems are used under extremely severe conditions.
Therefore, it is essential to comply not with general quality standards, but with strict international specifications.
Our company is equipped with:
○Numerous aerospace specifications, including AMS standards
○A special process management system backed by Nadcap accreditation
○Heat treatment technologies optimized for each material
These capabilities enable us to meet world-class requirements.
This ability to comply with such specifications is the key to earning trust in the aerospace and defense fields, and it represents our greatest strength.
