Corpotrate information

Company Name J-Devices Corporation
Registered HQ 1913-2 Takegashita Fukura Usuki-shi Oita
TEL: +81-50-3161-4938  FAX: +81-972-63-3160
Representative Yutaka Emoto, President & Representative Director
Established 6th November 1970
Capital JPY 5,117,592,747
Number of Employees 4,500
Locations Usuki (Registered HQ), Yokohama (Head office), Hakodate, Kitakami, Fukui, Fukuoka, Kitsuki,
Oita, Kumamoto, Shisui, Tokyo Office, Yokkaichi Office, USA Office, Europe Office
Business Wafer Probe, Package Assembly, Final Test, Package Development


1970 Established as Nakaya Electronic Manufacturing in Saiki city, Oita
1977 Moved the factory to Usuki city
1996 Acquired Shiraki Denshi
Corporate name changed to Nakaya Microdevices
1999 Certified ISO 9002 (ISO 9001)
2002 Acquired Taketa Toshiba Electronics and Denshi Giken Oita
2005 Certified ISO 14001
Acquired Japan Tobacco (JT) factory in Usuki
2006 Started operating at New Plant in Usuki city, Oita (Registered Head Office)
2008 Certified TS 16949
2009 Acquired the test business from Genesis Technology
Acquired the equipment of System LSI back-end from Toshiba Corporation
Received equity investments from Amkor Technology and Toshiba
Corporate name change to J-Devices Corporation
Opened Tokyo Sales Office
2012 Acquired the back-end factories from Fujitsu Semiconductor Corporation
2013 Acquired the back-end factories from Renesas Electronics Corporation
Established J-Devices Semiconductor Corporation as a wholly-owned subsidiary
Opened Yokohama head office
2014 Acquired Amkor Iwate Company and established Amkor Iwate Corporation as a wholly-owned subsidiary
Merged with Amkor Iwate Corporation
2015 Merged with J-Devices Semiconductor Corporation
Transferred the equipment and devices from Renesas Semiconductor Singapore
2017 Acquired Amkor Technology Japan and integrated Tokyo Sales Office

Message from the President

While the industry changes so fast, we will keep and improve Customer Satisfaction.

We started our business in 1970 and have continuously provided our customers with semiconductor back-end manufacturing services.


Since the start, we have been faced with a lot of environmental changes such as a structural change of global economy, substantial progress of the electronics industry and dramatic changes of the semiconductor industry structure. Despite such a lot of environmental changes, we have been successfully growing up from the first small factory in Oita prefecture to Japanese largest OSAT (Outsourced Semiconductor Assembly and Test) which has factories throughout Japan. This success is thanks to all the support from of course the customers, vendors, governments, people in related local area and other related people.


I would like to take this opportunity to express sincere gratitude to related people once again. Our strength in the semiconductor industry is high technical capabilities which are acquired by specializing in semiconductor back-end manufacturing. Backed up with these technical capabilities, we have achieved the high quality and the cost down execution ability. It's my sincere desire to continuously play a role in this semiconductor industry by developing our capabilities.

We would greatly appreciate if you could extend your warm support.

Management Principles

J-Devices Corporate Principles

Win customer's appreciation

Win customers appreciation by continuously providing the cost, technology, and service level, one step further than their expectations

Value enterprising and innovative spirit, and eliminate remaining weak points

There will be no tomorrow if we are satisfied with conventional ways. We will continuously innovate at all fronts including business model, technology, process, quality and personnel, and improve our value to the customers.

Act based on J-Devices'ethics criteria

《J-Devices' three "SAY"s》

"Is it the right thing to do?"
Always act by determining whether your action is right or not
"Self improvement"
Continue to try one's best and to improve one's self
Always be sincere to others

Mission of J-Devices

To become one of the leading global companies in the semiconductor back-end business

To continue developing the best assembly and testing technology

To continue achieving globally competitive cost

Provide the highest semiconductor back-end service to all customers


Usuki District

1913-2, Takegashita, Fukura, Usuki-shi, Oita
ZIP: 875-0053
TEL: +81-50-3161-4938
FAX: +81-972-63-3160


Yokohama / Head Office

New Stage Yokohama Bldg 17F, 1-1-32 Shinurashima-cho, Kanagawa-ku, Yokohama-shi, Kanagawa
ZIP: 221-0031
TEL: +81-45-594-6400
FAX: +81-45-594-6419


Kitsuki District

2820-2, Minami-Kitsuki, Kitsuki-shi, Oita
ZIP: 873-0002
TEL: +81-978-63-4111
FAX: +81-978-63-5699


Kitakami District

6-6, Kita-Kougyo-Danchi, Kitakami-shi, Iwate
ZIP: 024‐8650
TEL: +81-197-71-3241
FAX: +81-197-66-5294


Fukuoka District

476-1, Kamiokuma, Miyawaka-shi, Fukuoka
ZIP: 823-0005
TEL: +81-949-33-1692
FAX: +81-949-34-7222


Kumamoto District

272-10, Takaono, Ozu-machi, Kikuchi-gun, Kumamoto
ZIP: 869-1232
TEL: +81-96-294-0700
FAX: +81-96-294-0707


Tokyo Office

Shibakoen Front Tower 14F 2-6-3 Shibakoen Minato-Ku,Tokyo
ZIP: 105-0011
TEL: +81-3-5425-2830
FAX: +81-3-5425-2831


Europe Office

Archamps Technopole 60 avenue Marie Curie 74160 Archamps, France
TEL: +33-4-50-31-71-26


Hakodate District

145, Nakajima, Nanae-cho, Kameda-gun, Hokkaido
ZIP: 041-1196
TEL: +81-138-65-4111
FAX: +81-138-65-0200


Fukui District

1, Higashijima, Omaki, Harue-cho, Sakai-shi, Fukui
ZIP: 919-0402
TEL: +81-776-72-2611
FAX: +81-776-72-8050


Oita District

3500, Matsuoka, Oita-shi, Oita (inside Toshiba Oita Fab)
ZIP: 870-0197
TEL: +81-97-524-6124


Shisui District

19, Yoshitomi, Shisui-machi, Kikuchi-shi, Kumamoto
ZIP: 861-1201
TEL: +81-968-23-8111
TEL: +81-968-23-8114


Yokkaichi Office

YokkaichiMN Bldg.3F, 1-1, Suwasakae-machi, Yokkaichi-shi, Mie
ZIP: 510-0086
TEL: +81-59-340-3751
FAX: +81-59-340-3752


USA Office

2045 E Innovation Circle Tempe, AZ 85284, USA