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 CEO Yoshifumi Nakaya
Established 6th November 1970
Capital JPY 5,117,592,747
Number of Employees 4,700 (as of April 1, 2015)
Locations Usuki (Registered HQ), Yokohama (Head office), Kitsuki, Hakodate, Kitakami, Miyagi, Aizu, Neagari, Fukui, Fukuoka, Oita, Kumamoto, Shisui, Yokkaichi
Business Wafer Probe, Package Assembly, Final Test, Package Development


1970 Nakaya Electronic Manufacturing was established in Saiki City, Oita
1977 Moved the factory to Usuki city
1996 Changed the company name to Nakaya Microdevices
1999 Obtained ISO9002 certification [current ISO9001 (2000)]
2002 Acquisition of Taketa Toshiba Electronics and Denshi Giken Oita
2005 Obtained ISO14001 certification
Acquisition of Japan Tobacco (JT) factory in Usuki
2006 New Usuki factory opened
2008 Obtained TS16949 certification
2009 Acquisition of Genesis Technology's semiconductor test business
Received equity investments from Amkor Technology and Toshiba
Transferred the equipments of System LSI back-end services from Toshiba Corporation (Wafer probing line of Oita Operations / Assembly and Final test line of Toshiba LSI Package Solution)
Changed the company name into J-Devices Corporation
Tokyo Sales Office opened
2012 Transferred the back-end line factories from Fujitsu semiconductor
2013 Transferred the back-end factories from Renesas Electronics
And incorporated J-Devices Semiconductor Corporation as 100% subsidiary
Established the Yokohama head office in September
Unified Tokyo Office and Kawasaki R&D's and transferred a part of the head office function
2014 Established the Neagari District
Acquired all shares of Amkor Iwate Company from Amkor Technology Inc,
Amkor Iwate Company became 100% owned subsidiary of J-Devices Corporation
Merger with Amkor Iwate Company
2015 Merger with J-Devices Semiconductor Corporation

Message from the President

Yoshifumi Nakaya


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


Aizu District

1, Takaku-Kougyo-Dannchi, Aizuwakamatsu-shi, Fukushima
ZIP: 965-8577
TEL: +81-242-39-7111
FAX: +81-242-39-7801


Fukui District

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


USA Sales office

2045 E innovaEon Circle Tempe, AZ 85284, USA


Hakodate District

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


Miyagi District

1-1, Nishigaoka, Murata, Murata-machi, Shibata-gun, Miyagi
ZIP: 989-1304
TEL: +81-224-83-5111
FAX: +81-224-83-5116


Neagari District

Ha-86, Akai-machi, Noumi-shi, Ishikawa
ZIP: 929-0101
TEL: +81-761-55-8211
FAX: +81-761-55-5017


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 Sales office

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