Overview

Nihon Office Automation Research Co.,Ltd.

Nihon OA Kenkyusho is an independent IT system development company specializing in custom (scratch) development for two core segments: public sector systems for government ministries and agencies, and financial/corporate systems for banks, life insurers, and securities firms. The company operates primarily as a subcontractor to major system integrators and manufacturers (including NTT Data, NSD, and CIJ), contributing to mission-critical national infrastructure systems such as e-Tax (National Tax Agency), NACCS (customs/port processing), social insurance/pension systems, and air traffic control information systems. Its competitive strengths include nearly 40 years of public-sector development track record, direct government procurement qualification, NTT Data Business Partner certification, and a disciplined project selection process focused on quality, cost, and delivery (QCD) to minimize unprofitable engagements.

Market Cap
¥—B
EV
¥—B
StockUS$3.13(¥500)
US$1 = ¥159.70 (2026-11-12)
LTM EV/EBITDA
—
LTM EV/EBIT
—
LTM PER
—
LTM PBR
—
No price data
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Performance & Balance
Revenue 5Y (US$)
US$17.1M¥2.73B'23/12US$18.5M¥2.95B'24/12US$18.7M¥2.99B'25/12
EBITDA 5Y (US$)
US$0.30M¥0.05B'23/12US$0.77M¥0.12B'24/12US$0.99M¥0.16B'25/12
Net Income 5Y (US$)
US$0.17M¥0.03B'23/12US$0.46M¥0.07B'24/12US$0.68M¥0.11B'25/12
Capital Structure
68%
32%
EquityD/E 0.48xDebt
Liquidity vs Debt 5Y (US$)▲ Net Cash
CashInv. Sec.Debt
US$4.90M¥0.78BUS$3.69M¥0.59B'23/12US$4.38M¥0.70BUS$2.09M¥0.33B'24/12US$3.91M¥0.63BUS$1.21M¥0.19B'25/12
Shareholders
Top 10 hold 84.9%
1
Hiroaki OKUYAMA
54.57%
2
Nobuko OKUYAMA
13.08%
3
Hikari Tsushin KK Investment Limited Liability Partnership
7.05%
4
UH Partners 2 Investment Limited Liability Partnership
4.16%
5
Nobuhiro TAMURA
2.56%
6
HIKARI TSUSHIN,INC.
1.07%
7
UH 6 Co., Ltd.
0.80%
8
Tsuneo SANO
0.67%
9
Tomoko TAKASHIMA
0.53%
10
Satoshi TSUZAKA
0.45%
Management
9 officers
Hisashi SEKIYA
Representative Director, President
Apr 1994 Joined Konaka Co., Ltd. May 1998 Joined the Company Jul 2010 Assumed office as General Manager, Advanced Solutions Department Apr 2013 Assumed office as Director, General Manager, Public Promotion Division Jan 2018 Assumed office as Director, General Manager, Sales Headquarters Apr 2019 Assumed office as Director, General Manager, Public & Financial Business Division Jan 2020 Assumed office as Director, Executive Officer, General Manager, Public Services Division Mar 2021 Assumed office as Director, Managing Executive Officer, General Manager, Sales Division Jul 2023 Assumed office as Director, Executive Officer, General Manager, Corporate Planning Office Mar 2025 Assumed office as Director, Executive Vice President and Executive Officer, General Manager, Corporate Planning Office Jul 2025 Assumed office as Director, Executive Vice President and Executive Officer (in charge of Corporate Planning) Mar 2026 Assumed office as Representative Director, President (current)
1971-10-30
Kimihiko MACHINO
Director, Executive Officer, General Manager of Administration Division
Apr 1987 Joined The Hokkaido Takushoku Bank, Ltd. Sep 1990 Joined Mitsui Fudosan Loan & Guarantee Co., Ltd. Apr 1996 Joined Konami Co., Ltd. Jul 2008 Joined Vertexlink Co., Ltd. (now Striders Corporation) Apr 2010 Joined Arealink Co., Ltd. Aug 2011 Joined Taisho Audit Co., Ltd. Mar 2019 Joined MYNET Inc. Dec 2019 Joined the Company Mar 2020 Assumed office as Executive Officer, General Manager, Accounting & Finance Department Mar 2021 Assumed office as Director, Executive Officer, General Manager, Finance & Accounting Department Jul 2023 Assumed office as Director, Executive Officer, General Manager, Administration Division and Finance & Accounting Department Nov 2025 Assumed office as Director, Executive Officer, General Manager, Administration Division (current)
1962-09-05
Shingo TANAKA
Director, Executive Officer, General Manager of Business Promotion Division
Jul 1988 Joined ABE Co., Ltd. Aug 1990 Joined Seiyo Food Systems Co., Ltd. Mar 1998 Joined the Company May 2004 Assumed office as Director Jan 2020 Assumed office as Director, Managing Executive Officer, General Manager, Human Resources & General Affairs Department Mar 2021 Assumed office as Director, Managing Executive Officer, General Manager, Human Resources & General Affairs Department Jul 2023 Assumed office as Director, Executive Officer, General Manager, Business Strategy Office (current)
1964-03-17
Takuji KAWAHIGASHI
Full-time Audit & Supervisory Board Member
Apr 1979 Joined Software Science Co., Ltd. Jan 1990 Joined the Company as a contract employee Jan 2000 Joined the Company Oct 2003 Assumed office as Director Mar 2013 Concurrently Head of Kansai Branch Jan 2020 Assumed office as Director, Senior Managing Executive Officer, General Manager, Sales Coordination Division Mar 2021 Assumed office as Director, Senior Managing Executive Officer, General Manager, Business Promotion Department Jul 2023 Assumed office as Director, Executive Officer, General Manager, Sales Division Mar 2025 Resigned as Director, Executive Officer, General Manager, Sales Division Apr 2025 Assumed office as Internal Audit Officer, Internal Audit Office Mar 2026 Assumed office as Full-time Audit & Supervisory Board Member (current)
1958-11-05
Minoru TAKEBA
Director, Executive Officer, General Manager of Sales Division
Apr 1998 Joined Fujiya Co., Ltd. Aug 1998 Joined the Company Apr 2012 Assumed office as General Manager, Public Consulting Solutions Department Apr 2019 Assumed office as Executive Officer, in charge of Public Business and General Manager, Business Solutions Department Jul 2023 Assumed office as Executive Officer, General Manager, Public Division, Sales Division Jan 2024 Assumed office as Executive Officer, General Manager, Second Division, Sales Division Mar 2025 Assumed office as Director, Executive Officer, General Manager, Sales Division (current)
1975-06-24
Hiroki IWAMOTO
Director, Executive Officer, General Manager of Planning Division
Apr 1988 Joined Nippon Telegraph and Telephone Corporation Jul 1988 Joined NTT Data Communications Systems Corporation Apr 2001 Assumed office as Section Manager, Public Systems Business Division, NTT DATA Corporation Oct 2003 Assumed office as General Manager, Public Systems Business Division, NTT DATA Corporation Jun 2009 Assumed office as General Manager, First Public BU, First Public Systems Business Division, NTT DATA Corporation Jul 2014 Assumed office as Head of Third Public Business Department, Public Systems Business Division, NTT DATA Corporation Jun 2016 Assumed office as Representative Director, President, NTT DATA Kyushu Corporation Jun 2018 Assumed office as Executive Officer, Deputy General Manager, Third Business Division, NTT DATA-I Corporation Apr 2019 Assumed office as Executive Officer, General Manager, Third Business Division, NTT DATA-I Corporation Jun 2023 Assumed office as Director, Executive Officer, General Manager, Technology Division, NTT DATA-I Corporation Jul 2025 Joined the Company; assumed office as Executive Officer, Quality Assurance Department, Sales Division Mar 2026 Assumed office as Director, Executive Officer, General Manager, Planning Division (current)
1964-12-05
Mitsuki TSURUMAKI
Outside Director
Apr 1994 Joined NTT Data Communications Systems Corporation (now NTT DATA Corporation) Oct 2003 Registered as attorney-at-law Oct 2003 Joined Atsumi & Sakai Foreign Law Joint Enterprise Sep 2007 Joined Dewey & LeBoeuf LLP (New York, U.S.) Jan 2013 Partner, Miyake & Yamazaki Nov 2016 Partner, King & Wood Mallesons Foreign Law Joint Enterprise (current) Mar 2022 Assumed office as Outside Director of the Company (current)
1970-09-12
Yoshinori ARIMA
Outside Audit & Supervisory Board Member
Oct 2003 Joined Shin Nihon & Co. (now EY Shin Nihon LLC) Nov 2008 Joined Global Partners Consulting Inc. Mar 2010 Registered as Certified Public Accountant Apr 2019 Assumed office as Representative, Arima CPA Office (current) Oct 2019 Assumed office as Representative Director, Adxilia Consulting Inc. (current) Apr 2021 Assumed office as Auditor, Kihara Foundation (current) Mar 2022 Assumed office as Outside Audit & Supervisory Board Member of the Company (current) Sep 2023 Assumed office as Outside Audit & Supervisory Board Member, SBI FinTech Solutions Co., Ltd. (current) Jun 2024 Assumed office as Representative Partner, Adxilia Tax Accountant Corporation (current)
1977-07-20
Eri YOSHIKAWA
Outside Audit & Supervisory Board Member
Apr 1997 Joined Japan Finance Corporation Jan 2002 Acquired qualification as Gyoseishoshi (Administrative Scrivener) Nov 2004 Acquired qualification as Certified Social Insurance and Labor Consultant Jul 2006 Joined BE ENOS Inc. (formerly Net Price.com Co., Ltd.) Jun 2007 Joined DeNA Co., Ltd. Oct 2010 Joined mixi, Inc. Aug 2012 Opened Yoshikawa HR & Management Office as Representative (current) Dec 2013 Assumed office as Representative Director, MERIT Co., Ltd. (current) Mar 2022 Assumed office as Outside Audit & Supervisory Board Member of the Company (current)
1977-01-02
Large Shareholding Reports
Kotsushin Co., Ltd.
2026-08-07
7.56%→7.56%
Annual report (as of 2026-06-30): 1.07%
Hiroaki OKUYAMA
2026-06-25
57.67%→50.83%
Annual report (as of 2026-06-30): 54.57%
Hiroaki OKUYAMA
2026-06-24
57.67%→50.83%
Annual report (as of 2026-06-30): 54.57%
Koutsushin Co., Ltd.
2026-04-08
7.56%→7.56%
Annual report (as of 2026-06-30): 1.07%
Koutsushin Co., Ltd.
2026-02-02
7.56%→7.56%
Annual report (as of 2026-06-30): 1.07%
Koutsushin Co., Ltd.
2025-12-16
7.56%→7.56%
Annual report (as of 2026-06-30): 1.07%
Koutsushin Co., Ltd.
2025-11-13
6.54%→7.56%
Annual report (as of 2026-06-30): 1.07%
Koutsushin Co., Ltd.
2025-10-27
6.09%→6.54%
Annual report (as of 2026-06-30): 1.07%
Koutsushin Co., Ltd.
2025-09-29
5.25%→6.09%
Annual report (as of 2026-06-30): 1.07%
Koutsushin Co., Ltd.
2025-09-02
5.25%
Annual report (as of 2026-06-30): 1.07%
Disclosures
No disclosures
Primary Source Filings
TDnet
2026-08-14
Q2 Earnings Flash
FY ending Dec 2026
EDINET
2026-08-14
Semi-Annual Securities Report
Period: Jan 2026 – Dec 2026
EDINET
2026-08-07
Large Shareholding Report
TDnet
2026-07-30
特別損益
EDINETAmended
2026-06-25
Change Report
EDINET
2026-06-24
Large Shareholding Report
TDnet
2026-05-15
Q1 Earnings Flash
FY ending Dec 2026
EDINET
2026-04-08
Large Shareholding Report
EDINET
2026-03-25
Annual Securities Report
Period: Jan 2025 – Dec 2025
TDnet
2026-02-13
Full-Year Earnings Flash
FY ending Dec 2025
EDINET
2026-02-02
Large Shareholding Report
EDINET
2025-12-16
Large Shareholding Report
TDnet
2025-11-14
業績予想の修正
TDnet
2025-11-14
Q3 Earnings Flash
FY ending Dec 2025
EDINET
2025-11-13
Large Shareholding Report
EDINET
2025-10-27
Large Shareholding Report
EDINET
2025-09-29
Large Shareholding Report
EDINET
2025-09-02
Large Shareholding Report
EDINET
2025-08-14
Semi-Annual Securities Report
Period: Jan 2025 – Dec 2025
TDnet
2025-05-15
Q1 Earnings Flash
FY ending Dec 2025
EDINET
2025-03-28
Annual Securities Report
Period: Jan 2024 – Dec 2024
EDINETAmended
2024-12-13
Amended Securities Registration Statement
EDINETAmended
2024-12-10
Amended Securities Registration Statement
EDINETAmended
2024-12-05
Amended Securities Registration Statement
EDINET
2024-11-20
Securities Registration Statement
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