Overview
Construction

Taiyo Kisokogyo Co.,Ltd.

Taiyo Kiso Kogyo is a specialized civil engineering company primarily engaged in ground improvement works including soil stabilization, pipe jacking, underground continuous wall construction, liquefaction countermeasures, and slope reinforcement, serving both public and private sector clients. The company also operates in adjacent segments including residential foundation reinforcement, environmental civil engineering (solar and wind power facility construction, geothermal energy, soil remediation), building construction and real estate development, and construction machinery manufacturing and sales. Additionally, the company generates renewable energy revenues through solar power generation, diversifying its income streams beyond pure construction services.

Market Cap
¥4.37B
US$27.9M
EV
¥-1.49B
-US$9.51M
Stock¥2,186▼-1.89%
US$1 = ¥157.05 (2026-10-22)
LTM EV/EBITDA
NM
LTM EV/EBIT
NM
LTM PER
8.6
x
LTM PBR
0.5
x
2026-08-25 closing price basis: ranked #74 in beluuga.ai's "Japanese listed companies with negative Enterprise Value" ranking (simplified EV ≈ ¥-12B).
Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-27.6%pt
1001
Oct 23, 25 – Oct 23, 26StockTOPIX
1Sep 11, 26Q2 FY2027/01 earnings announced
MC → EV Bridge
4.37BUS$27.9MMarket Cap0.11BUS$0.73M+ Debt3.55BUS$22.6M− Cash2.43BUS$15.5M− Inv. Sec.-1.49B-US$9.51MEV
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Performance & Balance
Revenue 5Y (¥B)
12.9US$82.3M'22/114.7US$93.7M'23/114.6US$92.8M'24/113.5US$85.8M'25/114.5US$92.4M'26/1
EBITDA 5Y (¥B)
0.96US$6.13M'22/11.14US$7.26M'23/10.58US$3.67M'24/10.59US$3.75M'25/10.87US$5.54M'26/1
Net Income 5Y (¥B)
0.47US$3.02M'22/10.61US$3.90M'23/10.21US$1.35M'24/10.23US$1.46M'25/10.46US$2.94M'26/1
Capital Structure
99%
EquityD/E 0.01xDebt
Liquidity vs Debt 5Y (¥B)▲ Net Cash
CashInv. Sec.Debt
4.39US$28.0M0.13US$0.81M'22/14.94US$31.4M0.43US$2.77M'23/15.35US$34.0M0.29US$1.83M'24/14.84US$30.8M0.14US$0.89M'25/15.88US$37.5M0.15US$0.95M'26/1
Shareholders
Top 10 hold 62.2%
1
Kiyoshi TOYOZUMI
28.43%
2
Taiyo Kisokogyo Co.,Ltd. Business Partners' Stock Ownership Association
6.18%
3
Aichi Bank, Ltd.
4.50%
4
SBI SECURITIES Co., Ltd.
4.37%
5
Taiyo Kisokogyo Co.,Ltd. Employee Stock Ownership Association
3.36%
6
The Gifu Shinkin Bank
3.27%
7
Japan Ecosystem Co.,Ltd.
3.12%
8
The Takigami Steel Construction Co.,Ltd.
3.12%
9
SANTO CORPORATION
3.00%
10
Tokura Construction Co., Ltd.
2.88%
Management
11 officers
Yukimasa KATO
Representative Director, Chairman
May 1979 Joined the Company Nov 1994 Deputy General Manager, Tokyo Branch Jan 1998 Deputy Branch Manager, Tokyo Branch, and Manager, Saitama Branch Office Apr 2001 Director, Deputy Branch Manager, Nagoya Branch Oct 2003 General Manager, Nagoya Branch Apr 2007 Senior Managing Director Apr 2011 General Manager, Administration Division Apr 2017 Representative Director, President Feb 2026 Representative Director, Chairman (current)
1960-11-18
Toshiya ROKUSHIKA
Representative Director, President
Mar 1987 Joined the Company Mar 2004 General Manager, Sales Department, Nagoya Branch Feb 2006 Deputy Branch Manager, Nagoya Branch Apr 2011 Director, General Manager, Nagoya Branch Aug 2015 Director, General Manager, Sales Division Apr 2021 Managing Director, General Manager, Sales Division, and in charge of Eastern Japan Region Feb 2024 General Manager, Corporate Planning Division Feb 2025 Senior Managing Director Feb 2026 Representative Director, President (current)
1965-02-20
Atsuo TSUCHIYA
Senior Managing Director; General Manager, Construction Division, and Head of Kamimori R&D Center
Mar 1984 Joined the Company Apr 2001 General Manager, Machinery Business Division Apr 2005 Director Feb 2013 Head of Kamimori R&D Center (current) Aug 2015 General Manager, Construction Division (current) Apr 2021 Managing Director Feb 2025 Senior Managing Director (current)
1963-07-14
Yoshihiro OKUYAMA
Managing Director; General Manager, Sales Division
Jan 1983 Joined the Company Apr 1998 General Manager, Construction Department, Nagoya Branch Apr 2011 Deputy Branch Manager, Nagoya Branch Apr 2013 Director, General Manager, Tokyo Branch Apr 2017 Managing Director, in charge of Central Japan Region, and General Manager, Shizuoka Branch (current) Apr 2021 In charge of Central Japan Region Feb 2024 General Manager, Sales Division (current)
1957-09-03
Hideo ICHIOKA
Director; General Manager, Nagano Branch
Oct 1991 Joined the Company Apr 1998 General Manager, Construction Department, Nagano Branch Apr 2013 Director, General Manager, Nagano Branch (current)
1963-08-23
Kiyoshi TOYOZUMI
Director; General Manager, Building Division
Mar 2005 Joined the Company Nov 2009 Section Manager, Administration, Kamimori R&D Center Jan 2016 Section Manager, Sales, Tokyo Branch Feb 2017 General Manager, Building Department, Nagoya Branch Apr 2017 Director (current) Apr 2021 General Manager, Building Business Division Feb 2025 General Manager, Building Division (current)
1975-10-24
Hiroshi OKADA
Director; General Manager, Osaka Branch
Mar 1982 Joined the Company Apr 1993 Section Manager, Construction Department, Nagoya Branch Sep 2009 Section Manager, Construction, Machinery Business Division Apr 2013 Deputy Branch Manager and General Manager, Construction Department, Osaka Branch Apr 2018 Deputy Branch Manager, Osaka Branch Apr 2019 Director, General Manager, Osaka Branch (current)
1963-04-26
Masashi NAGASAWA
Director (Audit and Supervisory Committee Member)
Apr 1980 Joined Kajima Corporation Jul 1987 Examination Section, Personnel Department, Head Office, Kajima Corporation Nov 2000 Seconded to Mitsubishi Corporation Oct 2009 General Manager, Building Sales Division, Chubu Branch, Mitsubishi Corporation Jan 2013 General Manager, Administration Department, Chubu Branch, Mitsubishi Corporation Jul 2024 Joined the Company Apr 2025 Director (Audit and Supervisory Committee Member) (current)
1957-06-22
Morihisa ICHIYANAGI
Director (Audit and Supervisory Committee Member)
Aug 1974 Joined Ito Accounting Office, Audit Corporation Jan 2001 Representative Partner of the audit corporation Jul 2007 Opened Ichiyanagi Certified Public Accountant Office (to present) Apr 2008 Audit & Supervisory Board Member, the Company Apr 2017 Director, the Company Apr 2024 Director (Audit and Supervisory Committee Member) (current)
1949-09-12
Yoshinori OTA
Director (Audit and Supervisory Committee Member)
Apr 1977 Joined Naka Nihon Construction Consultants Co., Ltd. Oct 1997 General Manager, Design Division No. 3 Dec 1999 General Manager, Construction Technology Division No. 3 Apr 2002 General Manager, General Affairs Division Nov 2008 Executive Officer, General Manager, General Affairs Division Nov 2012 Director, General Manager, General Affairs Division Nov 2014 Full-time Audit & Supervisory Board Member Apr 2017 Audit & Supervisory Board Member, the Company Apr 2024 Director (Audit and Supervisory Committee Member) (current)
1954-04-25
Ko MINAMI
Director (Audit and Supervisory Committee Member)
Oct 1998 Joined Nagoya Office, Chuo Audit Corporation (now Azusa Audit LLC) Mar 2002 Registered as Certified Public Accountant Jul 2005 Seconded to Inspection Division, Tokai Finance Bureau, Ministry of Finance Jan 2009 Joined Kagayaki Audit Corporation Apr 2010 Registered as Certified Tax Accountant; opened Minami Ko Accounting Office as Head (current) Jun 2016 Outside Director, Audit and Supervisory Committee Member, Komehyo Co., Ltd. (now Komehyo Holdings Co., Ltd.) Apr 2019 Audit Board Member, Aichi Prefectural Public University Corporation (current) Nov 2020 Outside Audit & Supervisory Board Member, Yamahachi Shoji Co., Ltd. (current) Apr 2023 Audit & Supervisory Board Member, the Company Apr 2024 Director (Audit and Supervisory Committee Member) (current) Jun 2025 Outside Director, Audit and Supervisory Committee Member, Sanwa Yuka Kogyo Co., Ltd. (current)
1972-08-16
Large Shareholding Reports
Taiyo Kiso Kogyo Business Partners' Shareholding Association (Chairman: Yuji YAMAZAKI)
2025-11-25
5.06%
Disclosures
No disclosures
Primary Source Filings
EDINET
2026-09-10
Semi-Annual Securities Report
Period: Feb 2026 – Jan 2027
TDnet
2026-09-10
Q2 Earnings Flash
FY ending Jan 2027
TDnet
2026-06-11
Q1 Earnings Flash
FY ending Jan 2027
EDINET
2026-04-22
Annual Securities Report
Period: Feb 2025 – Jan 2026
TDnet
2025-12-12
Q3 Earnings Flash
FY ending Jan 2026
EDINET
2025-11-25
Large Shareholding Report
EDINET
2025-09-12
Semi-Annual Securities Report
Period: Feb 2025 – Jan 2026
TDnet
2025-06-13
Q1 Earnings Flash
FY ending Jan 2026
EDINET
2025-04-24
Annual Securities Report
Period: Feb 2024 – Jan 2025
TDnet
2024-12-13
Q3 Earnings Flash
FY ending Jan 2025
EDINET
2024-09-13
Semi-Annual Securities Report
Period: Feb 2024 – Jan 2025
EDINET
2024-06-13
Quarterly Securities Report
Period: Feb 2024 – Apr 2024
TDnet
2024-06-13
Q1 Earnings Flash
FY ending Jan 2025
EDINET
2024-04-24
Annual Securities Report
Period: Feb 2023 – Jan 2024
EDINET
2023-12-14
Quarterly Securities Report
Period: Aug 2023 – Oct 2023
EDINET
2023-09-13
Quarterly Securities Report
Period: May 2023 – Jul 2023
EDINET
2023-06-13
Quarterly Securities Report
Period: Feb 2023 – Apr 2023
EDINET
2023-04-24
Annual Securities Report
Period: Feb 2022 – Jan 2023
EDINET
2022-12-14
Quarterly Securities Report
EDINET
2022-09-14
Quarterly Securities Report
EDINET
2022-06-14
Quarterly Securities Report
EDINET
2022-04-25
Annual Securities Report
EDINET
2021-12-14
Quarterly Securities Report
EDINET
2021-09-14
Quarterly Securities Report
EDINET
2021-06-14
Quarterly Securities Report
EDINET
2021-04-23
Annual Securities Report
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