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Overview
Machinery

ONE GROUP CORP.

ONE GROUP CORP. is a holding company for a federation of small and medium-sized manufacturers specializing in precision metal processing, including gear manufacturing, metal pipe processing, precision micro-machining, industrial parts cutting, and screw fabrication. The group's core subsidiary, Ojic Co., Ltd. (founded 1952), produces high-precision gears and machined components serving automotive, aerospace, and defense industries, backed by quality certifications including ISO9001, ISO14001, and AS9100. By consolidating management functions and sharing manufacturing know-how across group companies, ONE GROUP diversifies revenue across multiple industries and enables advanced human resource development that differentiates it from single-industry manufacturers.

Market Cap
¥—B
EV
¥—B
Stock¥486▲+0.00%
US$1 = ¥156.80 (2026-10-23)
LTM EV/EBITDA
—
LTM EV/EBIT
—
LTM PER
—
LTM PBR
—
Price 1Y
Jun 30, 21 – Mar 1, 22
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Performance & Balance
Shareholders
Top 10 hold 100.0%
as of 2026-06-30 · Source: Annual Securities Report
1
Forward Co., Ltd.
70.00%
2
Fumihiko TANAKA
13.21%
3
Junko TANAKA
11.50%
4
Taiki TANAKA
5.28%
5
Nakano Alloy Co., Ltd.
0.01%
Management
6 officers
Fumihiko TANAKA
Representative Director, President
Feb. 1995: Joined Aucjik Co., Ltd. / Apr. 2000: Director, Head of Manufacturing Dept., same company / Apr. 2002: Senior Managing Director, same company / Mar. 2006: Representative Director, President & CEO, same company / May 2010: Chairman of the Board, Jianglin Co., Ltd. (current) / May 2011: Representative Director, President & CEO, Nihon Hyojun Haguruma Hanbai Co., Ltd. (now ONE GROUP Co., Ltd.) (current) / Dec. 2013: Representative Director, President & CEO, Iseki Tech Co., Ltd. (now Aucjik Co., Ltd.) / Sep. 2016: Representative Director, President & CEO, Seien Ltd. (now Seien Co., Ltd.) / Oct. 2017: Representative Director, President & CEO, Kajiya Co., Ltd. (now Aucjik Co., Ltd.) / Oct. 2018: Representative Director, President & CEO, Sansho Seiko Co., Ltd. / Nov. 2019: Representative Director, President & CEO, Mihara Seiko Co., Ltd. (now Aucjik Co., Ltd.) / Feb. 2020: Representative Director, Chairman, Fujitight Co., Ltd. / Jul. 2020: Representative Director, Chairman, Aucjik Co., Ltd. (current)
1972-01-17
Minoru OI
Director & General Manager, Corporate Management Division
Apr. 1978: Joined Numama Judicial Scrivener Office / Mar. 1979: Joined Suita Boeki Co., Ltd. / Jun. 1990: Joined Felissimo Corporation / Jun. 2004: Director, Head of Corporate Planning Dept., same company / Mar. 2007: Director, Head of Corporate Style Design Division, same company / Apr. 2011: Director, Head of Corporate Style Design Division & General Affairs Dept., same company / Mar. 2013: Director, Head of Strategic Support Dept. & Senior Business Division, same company / Mar. 2014: Director, Head of Corporate Planning Office, same company / Jan. 2015: Joined Kowa Seisakusho Co., Ltd., Head of Corporate Management Division / Mar. 2015: Director, Head of Corporate Management Division, same company / Jun. 2017: Director, Head of Corporate Management Division & Corporate Planning Dept., same company / Apr. 2019: Director, Head of Corporate Management Division, Corporate Planning Dept. & General Affairs Dept., same company / Nov. 2019: Joined Aucjik Co., Ltd. / Mar. 2020: Head of Corporate Management Division, same company / Jul. 2020: Director, Head of Corporate Management Division, the Company (current)
1956-03-03
Shinji AMAHATA
Director, Head of the President's Office
Mar. 1990: Joined Kyocera Corporation / Oct. 2004: Deputy General Manager, Consulting Osaka Division, Kyocera Communication Systems Co., Ltd. / Oct. 2006: Transferred to KCCS Management Consulting Co., Ltd. upon its establishment; General Manager, Kyoto Consulting Division, same company / Jun. 2015: Director, same company / Dec. 2015: Merged into Kyocera Communication Systems Co., Ltd. / Jan. 2016: General Manager, Kyoto Consulting Dept., Kyocera Communication Systems Co., Ltd. / Oct. 2018: General Manager, Kyoto Consulting Division, same company / Apr. 2021: General Manager, Consulting Business Division, same company / Apr. 2022: Executive Officer, same company / Apr. 2023: General Manager, Consulting Division, same company / Apr. 2024: Joined ONE GROUP Co., Ltd.; Head of President's Office / Sep. 2026: Director, Head of President's Office, the Company (current)
1967-10-10
Naoto KATAYAMA
Director (Audit & Supervisory Committee Member)
Apr. 1982: Joined Sumitomo Metal Industries, Ltd. (now Nippon Steel Corporation) / Jun. 1999: Seconded to Sumitomo Precision Products Co., Ltd.; Technical Counselor, Aerospace Equipment Division / Mar. 2003: Transferred to Sumitomo Precision Products Co., Ltd. / Jun. 2007: General Manager, Aerospace Quality Assurance Dept., same company / Jun. 2016: Representative Director, President & CEO, Sumisho Hydro Systems Co., Ltd. / Nov. 2019: Advisor, same company / Jun. 2020: Joined Aucjik Co., Ltd. / Jul. 2020: Advisor, Quality Assurance Division, same company / Jul. 2021: General Manager, Quality Assurance Division, same company / Feb. 2022: Audit & Supervisory Board Member, the Company / Sep. 2022: Director (Audit and Supervisory Committee Member), the Company (current)
1957-05-04
Motohiro SANO
Director (Audit & Supervisory Committee Member)
Apr. 1996: Joined Takeshi Budji Tax Accountant Office (now Chaos Co., Ltd.) / Nov. 1998: Registered as Certified Tax Accountant / Aug. 2003: Founded Honoo Comprehensive Accounting Office (now Trace Tax Corporation) and Kanae Management Co., Ltd.; Representative Director, President & CEO (current) / May 2014: Director, NPO Nara Club (current) / Jun. 2014: Joined Trace Tax Corporation as Co-Representative (current) / Jul. 2022: Audit & Supervisory Board Member, Nara Club Co., Ltd. / Jul. 2022: Outside Director, the Company / Sep. 2022: Outside Director (Audit and Supervisory Committee Member), the Company (current) / Oct. 2022: Director, Nara Club Co., Ltd. (current) / Jul. 2023: Representative Director, President & CEO, NIKS Co., Ltd. (current)
1970-09-25
Hiroshi MORITA
Director (Audit & Supervisory Committee Member)
Apr. 2000: Joined Matsushita Electric Industrial Co., Ltd. (now Panasonic Corporation) / Mar. 2007: Graduated from Kobe University Law School / Dec. 2008: Completed Legal Training / Dec. 2008: Joined Yodoyabashi & Yamagami LPC / Apr. 2014: Partner, Yodoyabashi & Yamagami LPC (current) / Jul. 2022: Outside Director, the Company / Sep. 2022: Outside Director (Audit and Supervisory Committee Member), the Company (current)
1977-07-26
Large Shareholding Reports
No filings
Disclosures
No disclosures
Primary Source Filings
TDnet
2026-09-28
発行者情報
FY ending Jun 2026
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