This page shows the profile of Yoshimasu Seisakusho.
Company / Information INDEX
MANAGEMENT PHILOSOPHY
There are numerous things to be improved like “Grains of Sand on the shore”.
This management philosophy originates from a conversation between the founder, Kazuma Yoshimasu, and his professor when the founder was a student in Kyushu University.
One day, during their walk on a beach in Hakata city the professor said, “There are numerous things to be improved like Grains of Sand on this shore. There’s no ending to that,” which impressed Kazuma.
The story has been passed down in the company over time, and around the 50th anniversary of the company, it was set as our management philosophy in the medium-term management plan.
Our constant technological innovation is firmly embedded into the culture at Yoshimasu Seisakusho.
COMPANY OVERVIEW
Company Name
Yoshimasu Seisakusho Co. Ltd.
Address
Head Office and Plant / 3-6-14 Ninomiya higashi, Akiruno-shi, Tokyo, 197-0815
Tel.042-558-2151(Main) Fax.042-558-2157
Soma Business Office / 131 Sakuragaoka, Nakamura, Soma-shi, Fukushima, 976-0042
Tel.0244-26-3257 Fax.0244-26-7257
Nagoya Business Office / #E Komakihara WELL’S21 North Bldg, 1758-5 Komakihara shinden, Komaki-shi, Aichi, 485-0012
Tel.0568-39-6139 Fax.0568-39-6179
Year of Establishment
1956
Company Representative
Danji Yoshimasu, President
Capital
20 million yen
Our Business
Manufacturing of aircraft engine and aerospace parts and components, and manufacturing of various precision metal parts
Main Customers
IHI Corporation, IHI AEROSPACE Co., Ltd., Kawasaki Heavy Industries, Ltd., Mitsubishi Heavy Industries, Ltd., The Yokohama Rubber Co., Ltd., NIPPI Corporation, Nabtesco Corporation, MINEBEA MITSUMI Inc.,
(in random order)
ACCESS
3-6-14 Ninomiya higashi, Akiruno-shi, Tokyo
Tel.042-558-2151(Main)
< By Train >
Approx. 12-minute walk from Higashi Akiru Station on the JR Itsukaichi Line
< By Taxi >
Approx. 3-minute ride from Higashi Akiru Station on the JR Itsukaichi Line
Approx. 7-minute ride from Fussa Station on the JR Ome Line
Approx. 7-minute ride from Haijima Station on the JR Ome Line
GROUP COMPANIES
Asek Co., Ltd
Address
521-8 Aza-nakanotani, Oaza-tsubone, Murakami-shi, Niigata, 958-0822
Tel.0254-53-5530 Fax.0254-53-5533
Year of Foundation
1989
Company Representative
Danji Yoshimasu, President
Sanyu Industries Co., Ltd.
Address
Niigata Murakami Plant / 521-8 Aza-nakanotani, Oaza-tsubone, Murakami-shi, Niigata, 958-0822
Tel.0254-62-7330 Fax.0254-62-7341
Niigata Nakajo Plant / 9-158 Shimizu, Tainai-shi, Niigata, 959-2600
Tel.0254-28-7100 Fax.0254-28-7111
Year of Foundation
1967
Company Representative
Danji Yoshimasu, President
Capital
10 million yen
Website
Chelsea International Co., Ltd.
Address
4-45 Minamimotomachi, Shinjuku-ku, Tokyo,160-0012
Tel.03-5367-1061 Fax.03-3341-3641
Osaka Sales Office / 6F, OWL Kawaramachi Building, 3-3-16 Kawaramachi, Chuo-ku, Osaka-shi, Osaka, 541-0048
Tel.06-6484-7301 Fax.06-6484-7302
Year of Foundation
1995
Company Representative
Danji Yoshimasu, Chairman
Noriaki Miyashita, President
Capital
28 million yen
Website
https://www.chelsea-international.com/
HISTORY
1956 Establishment of Yoshimasu Seisakusho
1960 Foundation of Yoshimasu Seisakusho Co. Ltd.
1967 Foundation of Sanyu Industries Co., Ltd., the group
company
1969 Capital was increased to 3 million yen
1980 Capital was increased to 6 million yen
1983 Takeaki Yoshimasu’s assumption of the company
President
1985 Construction of a new plant in Akigawa and
relocation of Head Office to Akigawa Foundation
of Asek Co., Ltd., the group company
1993 Capital was increased to 20 million yen
1999 Received ISO9002 Certification
2002 Upgraded to JIS Q 9100:2001 (has been recertified
since then)
2006 Received NADCAP Accreditation (Laser machining)
(has been reaccredited since then)
2007 Added the Second plant
2008 Added the Third plant
Received NADCAP Accreditation (Wire EDM
Machining) (has been reaccredited since then)
Received JIS Q 27001:2006 Certification (has been
recertified since then)
2010 Received NADCAP Accreditation (TIG welding)
(has been reaccredited since then)
2011 Received JIS Q 9100:2009 Certification (has been
recertified since then)
2012 Received NADCAP Accreditation (Heat treatment):
ASEK Co., Ltd.
2013 Received NADCAP Accreditation (Fluorescence
penetrant inspection)
2014 Received “Technical Development Award (for small
to medium sized enterprises)” from The Japan Society
for Technology of Plasticity, for the development of
Electric Resistance Heat Hot Stamping.
2016 Added the ASEK Co., Ltd. Third Plant
2017 Newly built the Sanyu Industries Co., Ltd. Nakajo
Plant
| 1956 | Establishment of Yoshimasu Seisakusho |
| 1960 | Foundation of Yoshimasu Seisakusho Co. Ltd. |
| 1967 | Foundation of Sanyu Industries Co., Ltd., the group company |
| 1969 | Capital was increased to 3 million yen |
| 1980 | Capital was increased to 6 million ye |
| 1983 | Takeaki Yoshimasu’s assumption of the company President |
| 1985 | Construction of a new plant in Akigawa and relocation of Head Office to Akigawa Foundation of Asek Co., Ltd., the group company |
| 1993 | Capital was increased to 20 million yen |
| 1999 | Received ISO9002 Certification |
| 2002 | Upgraded to JIS Q 9100:2001 (has been recertified since then) |
| 2006 | Received NADCAP Accreditation (Laser machining) (has been reaccredited since then) |
| 2007 | Added the Second plant |
| 2008 | Added the Third plant Received NADCAP Accreditation (Wire EDM Machining) (has been reaccredited since then) Received JIS Q 27001:2006 Certification (has been recertified since then) |
| 2010 | Received NADCAP Accreditation (TIG welding) (has been reaccredited since then) |
| 2011 | Received JIS Q 9100:2009 Certification (has been recertified since then) |
| 2012 | Received NADCAP Accreditation (Heat treatment): ASEK Co., Ltd. |
| 2013 | Received NADCAP Accreditation (Fluorescen penetrant inspection) |
| 2014 | Received “Technical Development Award (for small to medium sized enterprises)” from The Japan Society for Technology of Plasticity, for the development of Electric Resistance Heat Hot Stamping. |
| 2016 | Added the ASEK Co., Ltd. Third Plant |
| 2017 | Newly built the Sanyu Industries Co., Ltd. Nakaj Plant |