Overview
Construction

TAISEI ONCHO CO.,LTD.

Taisei Oncho is a specialized mechanical and electrical (M&E) engineering contractor providing design and construction services for HVAC, plumbing and sanitation, electrical, temperature/humidity control, refrigeration, and related building systems. The company serves commercial, industrial, and residential clients primarily in Japan, with additional operations in the United States (Hawaii), China (Shanghai), Australia, and Vietnam. Its competitive strengths lie in its multi-decade track record in precision environmental control engineering, an integrated group structure covering construction, equipment sales, real estate, and solar power generation, and international project experience across Asia-Pacific and North America.

Market Cap
¥30.7B
US$196M
EV
¥11.0B
US$70.1M
Stock¥1,236▲+0.32%
US$1 = ¥156.80 (2026-10-23)
LTM EV/EBITDA
2.4
x
LTM EV/EBIT
2.8
x
LTM PER
8.9
x
LTM PBR
1.0
x
Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-2.9%pt
100
Oct 24, 25 – Oct 23, 26StockTOPIX
MC → EV Bridge
30.7BUS$196MMarket Cap3.00BUS$19.1M+ Debt17.8BUS$114M− Cash4.90BUS$31.2M− Inv. Sec.11.0BUS$70.1MEV
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Performance & Balance
Revenue 5Y (¥B)
49.2US$313M'22/346.5US$296M'23/361.1US$389M'24/362.5US$399M'25/361.7US$394M'26/3
EBITDA 5Y (¥B)
1.61US$10.2M'22/32.10US$13.4M'23/33.44US$21.9M'24/33.54US$22.6M'25/34.56US$29.1M'26/3
Net Income 5Y (¥B)
0.97US$6.21M'22/31.47US$9.37M'23/31.96US$12.5M'24/32.49US$15.9M'25/33.55US$22.6M'26/3
Capital Structure
91%
EquityD/E 0.10xDebt
Liquidity vs Debt 5Y (¥B)▲ Net Cash
CashInv. Sec.Debt
16.7US$106M'22/315.8US$101M'23/314.3US$91.5M0.03US$0.20M'24/316.7US$107M2.70US$17.2M'25/323.7US$151M'26/3
Shareholders
Top 10 hold 39.4%
1
Aquawedge Co., Ltd.
15.81%
2
TAISEI ONCHO CO.,LTD. Business Partners' Stock Ownership Association
8.42%
3
Taisei Ontec Scholarship Foundation (General Incorporated Foundation)
5.57%
4
TAISEI ONCHO CO.,LTD. Employee Stock Ownership Association
2.50%
5
Hideo MIZUTANI
1.77%
6
Kazuhei KAWAMURA
1.42%
7
TOTECH CORPORATION
1.12%
8
Custody Bank of Japan, Ltd. (Trust Account)
1.03%
9
Shohei KAWAMURA
0.94%
10
Fumiko WADA
0.80%
Management
10 officers
Kenichi MIZUTANI
Representative Director, President and Executive Officer, in charge of Overseas Division
Apr 2003 Joined the Company Apr 2009 Executive Officer; General Manager, Overseas Group; Head of Green Energy Division and Business Management Office Apr 2010 Senior Executive Officer; Head of Overseas Business Division; in charge of Corporate Planning Group Jun 2010 Director, Senior Executive Officer; Head of Overseas Business Division; in charge of Corporate Planning Group Apr 2011 Director; Head of Overseas Business Division and Head of Southeast Asia Business Department; in charge of Corporate Planning Group Apr 2012 Director; General Manager, President's Office; General Manager, Overseas Group; Head of China Business Division; in charge of Pan-Pacific Business Department and Corporate Planning Group Oct 2012 Managing Director; General Manager, President's Office; General Manager, Overseas Group; Head of China Business Division; in charge of Pan-Pacific Business Department and Corporate Planning Group Apr 2013 Managing Director; General Manager, President's Office; in charge of Head Office Administration Group, Corporate Planning Group and Pan-Pacific Business Department; Head of China Business Division Apr 2014 Managing Director; General Manager, President's Office; in charge of Pan-Pacific Business Division; Head of Pan-Pacific Business Division Oct 2014 Managing Director; General Manager, President's Office; in charge of Pan-Pacific Business Division Apr 2015 Representative Director, President Apr 2021 Representative Director, President and Executive Officer Apr 2024 Representative Director, President and Executive Officer; in charge of Overseas Division (current)
1976-12-25
Masayuki TAMAKI
Director, Senior Managing Executive Officer; in charge of Group Companies and Administration Division
Apr 1974 Joined the Company Apr 2016 Executive Officer; Deputy General Manager, Metropolitan Area Construction Business Division Apr 2018 Senior Executive Officer; General Manager, Construction Division, Tokyo Head Office Apr 2020 Managing Executive Officer; Deputy Head, Tokyo Head Office; General Manager, Construction Division Jun 2020 Director, Managing Executive Officer; Deputy Head, Tokyo Head Office; General Manager, Construction Division Apr 2021 Director, Managing Executive Officer; in charge of Construction Division; Head of Engineering Division Apr 2022 Director, Senior Managing Executive Officer; in charge of Construction Division and Engineering Division Apr 2024 Director, Senior Managing Executive Officer; in charge of Construction Division Apr 2025 Director, Senior Managing Executive Officer; in charge of Corporate Division and Engineering Division Apr 2026 Director, Senior Managing Executive Officer; in charge of Group Companies and Administration Division (current)
1956-04-01
Toru KAWAKAMI
Director, Senior Managing Executive Officer; in charge of Planning Division and Human Resources Division
Apr 1980 Joined the Company Apr 2014 Executive Officer; Deputy Head, Metropolitan Area Business Headquarters; General Manager, Metropolitan Area Sales Business Department Apr 2018 Senior Executive Officer; General Manager, Kanto Branch Apr 2022 Managing Executive Officer; General Manager, Tokyo Head Office Apr 2023 Senior Managing Executive Officer; in charge of Sales Division and Sales Headquarters Jun 2023 Director, Senior Managing Executive Officer; in charge of Sales Division and Sales Headquarters Apr 2025 Director, Senior Managing Executive Officer; in charge of Planning Division Apr 2026 Director, Senior Managing Executive Officer; in charge of Planning Division and Human Resources Division (current)
1957-08-16
Koji OKADA
Director, Managing Executive Officer; in charge of Sales Division and Design Division
Apr 1985 Joined the Company Apr 2018 Executive Officer; General Manager, General Planning Office Apr 2020 Senior Executive Officer; General Manager, General Planning Office Jun 2020 Director, Senior Executive Officer; General Manager, General Planning Office Apr 2021 Director, Managing Executive Officer; in charge of Corporate Headquarters, General Planning Office and domestic subsidiaries; responsible for DX Strategy Apr 2023 Director, Managing Executive Officer; in charge of Administration Division; General Manager, General Planning Headquarters Apr 2024 Director, Managing Executive Officer; in charge of Planning Division; General Manager, General Planning Headquarters Apr 2025 Director, Managing Executive Officer; in charge of Sales Division Apr 2026 Director, Managing Executive Officer; in charge of Sales Division and Design Division (current)
1961-05-08
Yukimitsu TOMIOKA
Director, Managing Executive Officer; in charge of Engineering/Construction Division and Business Reform Division
Apr 1984 Joined the Company Apr 2020 Executive Officer; General Manager, Quality and Safety Control Department, Business Management Headquarters Apr 2022 Senior Executive Officer; Deputy Head, Tokyo Head Office; General Manager, Construction Division Apr 2024 Managing Executive Officer; in charge of Engineering Division and Business Reform; General Manager, Engineering Headquarters Jun 2024 Director, Managing Executive Officer; in charge of Engineering Division and Business Reform; General Manager, Engineering Headquarters Jun 2025 Director, Managing Executive Officer; in charge of Systems Division and Business Reform Project Apr 2026 Director, Managing Executive Officer; in charge of Engineering/Construction Division and Business Reform Division (current)
1961-04-07
Yasuyuki IMAI
Director, Audit and Supervisory Committee Member
Apr 1985 Joined the Company Apr 2013 Executive Officer; General Manager, Yokohama Branch Apr 2015 Senior Executive Officer; General Manager, Tokai Business Headquarters Apr 2018 Managing Executive Officer; General Manager, West Japan Branch Apr 2020 Managing Executive Officer; General Manager, West Japan Branch and Head of Overseas Business Division Jun 2020 Director, Managing Executive Officer; General Manager, West Japan Branch and Head of Overseas Business Division Apr 2021 Director, Managing Executive Officer; in charge of West Japan and Overseas Businesses; Head of Overseas Business Division Apr 2023 Director, Managing Executive Officer; in charge of Overseas Business Division; Head of Overseas Business Division Apr 2024 Director Jun 2024 Director, Audit and Supervisory Committee Member (current)
1961-04-16
Taito OE
Director
Apr 2011 Joined Takenaka Corporation Jun 2016 Joined Plantec General Planning Office Co., Ltd. Jun 2018 Director, Plantec Associates Co., Ltd. Feb 2020 Vice President and Director, Plantec Associates Co., Ltd. May 2020 MBA, Harvard Business School Jul 2021 Founded Fortec Architects Co., Ltd.; Representative Director, President (current) May 2022 Representative Director, TO Co., Ltd. (current) Aug 2022 Advisor, the Company Jun 2023 Outside Director, the Company (current) Dec 2023 Director, Biz Architects Co., Ltd. (current) Jun 2024 Outside Director, Totsu Co., Ltd. (current) Nov 2025 Director, TAOKI Co., Ltd. (current)
1988-08-04
Kaori MATSUSHITA
Director, Audit and Supervisory Committee Member
Apr 1982 Joined Fujitsu Limited Jan 2001 Manager, Mobile Business Division, Fujitsu Limited (Global Business) Jun 2008 General Manager, Project Management Office, Global Strategy Division, Fujitsu Limited (Strategic Alliances) Sep 2013 Concurrently, Diversity Mentor, Women's Development Project, Fujitsu Limited Apr 2016 Senior Director, Global Marketing Division, Fujitsu Limited (Responsible for Global Strategic Alliance with Microsoft Corporation) May 2019 Representative CEO, K&L Consulting LLC (currently President and Representative Director, K&L Consulting Co., Ltd.) (current) Jun 2020 Outside Director (Audit and Supervisory Committee Member), the Company (current) Jun 2022 Outside Director, TS Tech Co., Ltd. (current)
1959-04-16
Takashi MURAKI
Director, Audit and Supervisory Committee Member
Oct 2005 Registered as attorney-at-law (Tokyo Bar Association); joined Roa United Law Office Oct 2013 Promoted to Partner, Roa United Law Office Jan 2021 Joined Hayakawa Keiei Law Office (currently Hayakawa & Muraki Law Office) as Partner (current) Jun 2024 Outside Director (Audit and Supervisory Committee Member), the Company (current)
1974-01-11
Sachiko ENOMOTO
Director, Audit and Supervisory Committee Member
Nov 2004 Joined Deloitte Touche Tohmatsu LLC Jun 2008 Registered as Certified Public Accountant Aug 2017 Opened Sachiko Enomoto CPA Office (continuing to present) Jul 2020 Auditor, Enomoto Shoji Co., Ltd. (current) Apr 2021 Family Court Mediation Commissioner, Nagoya Family Court Jun 2023 Outside Auditor, Taiho Kogyo Co., Ltd. (current) Oct 2023 Civil Mediation Commissioner, Nagoya District Court and Nagoya Summary Court (current) Jun 2024 Outside Director (Audit and Supervisory Committee Member), Hagihara Electric Holdings Co., Ltd. Jan 2025 Judicial Commissioner, Nagoya Summary Court (current) Jun 2025 Outside Director (Audit and Supervisory Committee Member), the Company (current) Apr 2026 Outside Director (Audit and Supervisory Committee Member), MIRAINI Holdings Co., Ltd. (current)
1974-05-26
Large Shareholding Reports
Taisei Onchō Business Partners Shareholding Association, Chairman Hiroshi TAKAHASHI
2026-09-18
7.46%→7.82%
Disclosures
No disclosures
Primary Source Filings
EDINET
2026-09-18
Large Shareholding Report
TDnet
2026-08-06
Q1 Earnings Flash
FY ending Mar 2027
EDINET
2026-06-24
Annual Securities Report
Period: Apr 2025 – Mar 2026
TDnet
2026-02-12
Q3 Earnings Flash
FY ending Mar 2026
EDINET
2025-11-13
Semi-Annual Securities Report
Period: Apr 2025 – Mar 2026
TDnet
2025-08-07
Q1 Earnings Flash
FY ending Mar 2026
EDINET
2025-08-07
Securities Registration Statement
EDINET
2025-06-24
Annual Securities Report
Period: Apr 2024 – Mar 2025
TDnet
2025-02-13
Q3 Earnings Flash
FY ending Mar 2025
EDINET
2024-11-12
Semi-Annual Securities Report
Period: Apr 2024 – Mar 2025
TDnet
2024-08-08
Q1 Earnings Flash
FY ending Mar 2025
EDINET
2024-06-25
Annual Securities Report
Period: Apr 2023 – Mar 2024
EDINET
2024-02-09
Quarterly Securities Report
Period: Oct 2023 – Dec 2023
EDINET
2023-11-13
Quarterly Securities Report
Period: Jul 2023 – Sep 2023
EDINET
2023-08-10
Quarterly Securities Report
Period: Apr 2023 – Jun 2023
EDINET
2023-06-29
Annual Securities Report
Period: Apr 2022 – Mar 2023
EDINET
2023-02-10
Quarterly Securities Report
Period: Oct 2022 – Dec 2022
EDINET
2022-11-11
Quarterly Securities Report
EDINET
2022-08-05
Quarterly Securities Report
EDINET
2022-06-27
Annual Securities Report
EDINET
2022-02-14
Quarterly Securities Report
EDINET
2021-11-12
Quarterly Securities Report
EDINET
2021-08-06
Quarterly Securities Report
EDINETAmended
2021-08-05
Amended Annual Securities Report
EDINET
2021-06-25
Annual Securities Report
EDINET
2021-02-10
Quarterly Securities Report
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