Overview
Transportation Equipment

TANAKA SEIMITSU KOGYO CO.,LTD.

Tanaka Seimitsu Kogyo is a precision parts manufacturer primarily supplying automotive components to Honda Motor Co., Ltd., its principal customer and key related party. The company's core Parts Manufacturing segment produces engine components (e.g., VTEC rocker arms, valve lifters, piston pins), transmission parts (synchronizer rings, shafts), and electric powertrain components (inverter frames, motor covers) for 4-wheel, 2-wheel, and general-purpose applications across domestic and overseas facilities. Beyond parts manufacturing, the company operates a Solutions segment offering factory automation equipment and motor manufacturing systems, as well as a Mobility segment handling Honda product sales and rental services through group dealerships.

Market Cap
¥10.7B
US$68.3M
EV
¥10.3B
US$65.5M
Stock¥1,100▲+0.00%
US$1 = ¥157.05 (2026-10-22)
LTM EV/EBITDA
1.9
x
LTM EV/EBIT
1.3
x
LTM PER
5.0
x
LTM PBR
0.4
x
Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-17.4%pt
100123
Oct 23, 25 – Oct 22, 26StockTOPIX
1Nov 28, 25Strong Q2 FY2026 earnings results
2Apr 1, 26Full year FY2026 earnings announcement
3Jul 31, 26Q1 FY2027/03 earnings announced
MC → EV Bridge
10.7BUS$68.3MMarket Cap6.17BUS$39.3M+ Debt11.5BUS$73.2M− Cash2.23BUS$14.2M− Inv. Sec.7.11BUS$45.3M+ NCI10.3BUS$65.5MEV
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Performance & Balance
Revenue 5Y (¥B)
29.7US$189M'22/334.2US$218M'23/342.5US$271M'24/340.5US$258M'25/343.8US$279M'26/3
EBITDA 5Y (¥B)
4.15US$26.4M'22/34.86US$31.0M'23/36.32US$40.2M'24/35.21US$33.2M'25/35.05US$32.2M'26/3
Net Income 5Y (¥B)
0.37US$2.38M'22/31.02US$6.51M'23/32.22US$14.1M'24/31.79US$11.4M'25/31.19US$7.60M'26/3
Capital Structure
81%
19%
EquityD/E 0.23xDebt
Liquidity vs Debt 5Y (¥B)▲ Net Cash
CashInv. Sec.Debt
9.62US$61.2M8.20US$52.2M'22/311.0US$69.8M6.71US$42.7M'23/314.1US$89.5M4.08US$26.0M'24/312.8US$81.4M4.09US$26.1M'25/313.0US$82.8M6.74US$42.9M'26/3
Shareholders
Top 10 hold 67.1%
1
HONDA MOTOR CO.,LTD.
24.35%
2
Stock Ownership Association
13.02%
3
Nagoya Small and Medium Business Investment & Consultation Co., Ltd.
5.40%
4
Ichiro TANAKA
5.27%
5
Tatsuro TANAKA
4.61%
6
The Shoko Chukin Bank, Ltd.
3.58%
7
TANAKA SEIMITSU KOGYO CO.,LTD. Employee Stock Ownership Association
3.31%
8
The Hokuriku Bank, Ltd.
3.17%
9
THE FIRST BANK OF TOYAMA,LTD.
2.76%
10
MUFG Bank, Ltd.
1.64%
Management
8 officers
Eiichiro TANAKA
Representative Director, President and Executive Officer
Jan 2003 Joined the Company Apr 2009 Plant Manager, Tanaka Automotive Parts Industry Co., Ltd. Apr 2014 General Manager, Sales Administration Department, Tanaka Engineering Co., Ltd. Apr 2015 Executive Officer of the Company; Representative Director, President, Tanaka Engineering Co., Ltd. Mar 2017 Representative Director, Chairman, Tanaka Engineering Co., Ltd. Apr 2017 Managing Executive Officer of the Company Jun 2017 Director and Managing Executive Officer of the Company Apr 2018 Director and Senior Managing Executive Officer of the Company Apr 2021 Representative Director, Vice President and Executive Officer of the Company Apr 2022 Representative Director, President and Executive Officer of the Company (current)
1975-10-21
Katsuya YAMADA
Director, Executive Officer, General Manager, Parts Manufacturing Business Division
Mar 1990 Joined the Company Apr 2016 General Manager, Sales Planning Department of the Company Apr 2017 Executive Officer of the Company Jun 2018 Director and Executive Officer of the Company (current) Apr 2022 General Manager, Parts Manufacturing Business Division (current) Compliance and Risk Management Officer (current)
1968-02-15
Kenji OKI
Director, Executive Officer, General Manager, Administration Division, General Manager, Mobility Business Division, President and Executive Officer, T-Start Co., Ltd.
Sep 1994 Joined the Company Apr 2018 General Manager, Administration Department of the Company Apr 2020 Executive Officer of the Company Jun 2021 Director and Executive Officer of the Company (current) Jun 2022 Representative Director, President, Reward Growth Co., Ltd. Apr 2023 General Manager, Administration Division of the Company (current) Apr 2025 General Manager, Mobility Business Division of the Company (current) Apr 2026 President and Executive Officer, T-Start Co., Ltd. (current)
1972-03-01
Etsuro TAKAGI
Director
Apr 1982 Joined Nippon Kogyo Bank, Ltd. (now Mizuho Bank, Ltd.) Jul 1988 Joined Toyama Seitai Co., Ltd. (now TSK Co., Ltd.) Apr 1992 Representative Director, President, Toyama Seitai Co., Ltd. Jun 2020 Audit and Supervisory Board Member of the Company May 2022 Representative Director, Chairman, TSK Co., Ltd. (current) Jun 2022 Director of the Company (current)
1959-10-29
Shinako MATSUYAMA
Director
Apr 1988 Joined NEC Information Systems, Ltd. (now NEC Solution Innovators, Ltd.) Apr 1998 Joined Sony Corporation (now Sony Group Corporation) Jul 2015 Joined Milliman, Inc. Feb 2017 Joined Tokyo Electron Limited Jan 2022 General Manager, DX Planning and Promotion Department, Corporate Innovation Division, Tokyo Electron Limited Jul 2024 Deputy Leader, Business Reform DX Promotion Project, Tokyo Electron Limited Jun 2025 Director of the Company (current) Jul 2025 Vice President in charge of Promotion, Business Design Division, Tokyo Electron Limited (current) Mar 2026 Outside Director, Nabtesco Corporation (current)
1964-04-19
Mutsumi TAKAHASHI
Full-time Audit and Supervisory Board Member
Mar 1988 Joined the Company Apr 2014 General Manager, Manufacturing Division, Head Office of the Company Apr 2017 President, Tanaka Precision (Thailand) Co., Ltd. Apr 2022 Executive Officer of the Company Jun 2025 Full-time Audit and Supervisory Board Member of the Company (current)
1965-06-25
Taizo OKEYA
Audit and Supervisory Board Member
Mar 1979 Registered as a Certified Tax Accountant Jun 2003 Outside Audit and Supervisory Board Member, Asahi Printing Co., Ltd. (current) Jun 2007 Outside Audit and Supervisory Board Member, Kokankado Co., Ltd. (current) Jun 2016 Audit and Supervisory Board Member of the Company (current)
1953-12-09
Minori MINAMI
Audit and Supervisory Board Member
Dec 2011 Registered as an Attorney at Law Jan 2012 Joined Urasaki Law Office Jan 2015 Office renamed Urasaki Minami Law Office; Co-Representative Partner May 2019 Office renamed Hirono Minami Law Office Jun 2025 Outside Director, Hokuriku Denki Kouji Co., Ltd. (current) Jun 2025 Audit and Supervisory Board Member of the Company (current)
1982-05-06
Large Shareholding Reports
Honda Motor Co., Ltd.
2026-07-10
24.34%→13.38%
Honda Motor Co., Ltd.
2026-06-18
24.34%→24.34%
Honda Motor Co., Ltd.
2026-05-21
24.34%→24.34%
Honda Motor Co., Ltd.
2025-11-27
24.34%
Disclosures
No disclosures
Primary Source Filings
TDnet
2026-07-31
Q1 Earnings Flash
FY ending Mar 2027
EDINET
2026-07-10
Large Shareholding Report
EDINET
2026-06-22
Annual Securities Report
Period: Apr 2025 – Mar 2026
EDINET
2026-06-18
Large Shareholding Report
EDINET
2026-06-12
公開買付報告書
EDINET
2026-05-21
Large Shareholding Report
EDINET
2026-05-15
公開買付届出書
TDnet
2026-01-30
Q3 Earnings Flash
FY ending Mar 2026
EDINETAmended
2025-11-27
Change Report
EDINET
2025-11-13
Semi-Annual Securities Report
Period: Apr 2025 – Mar 2026
TDnet
2025-07-31
Q1 Earnings Flash
FY ending Mar 2026
EDINET
2025-06-24
Annual Securities Report
Period: Apr 2024 – Mar 2025
TDnet
2025-01-31
Q3 Earnings Flash
FY ending Mar 2025
EDINET
2024-11-13
Semi-Annual Securities Report
Period: Apr 2024 – Mar 2025
TDnet
2024-07-31
Q1 Earnings Flash
FY ending Mar 2025
EDINET
2024-06-24
Annual Securities Report
Period: Apr 2023 – Mar 2024
EDINETAmended
2024-06-06
Amended Annual Securities Report
Period: Apr 2021 – Mar 2022
EDINETAmended
2024-06-06
Amended Quarterly Securities Report
Period: Jul 2022 – Sep 2022
EDINETAmended
2024-06-06
Amended Quarterly Securities Report
Period: Jul 2023 – Sep 2023
EDINETAmended
2024-06-06
Amended Annual Securities Report
Period: Apr 2019 – Mar 2020
EDINETAmended
2024-06-06
Amended Quarterly Securities Report
Period: Jul 2021 – Sep 2021
EDINETAmended
2024-06-06
Amended Quarterly Securities Report
Period: Jul 2020 – Sep 2020
EDINETAmended
2024-06-06
Amended Annual Securities Report
Period: Apr 2022 – Mar 2023
EDINETAmended
2024-06-06
Amended Annual Securities Report
Period: Apr 2020 – Mar 2021
EDINETAmended
2024-06-06
Amended Quarterly Securities Report
Period: Jul 2019 – Sep 2019
EDINET
2024-02-13
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
2023-06-26
Annual Securities Report
Period: Apr 2022 – Mar 2023
EDINET
2023-02-13
Quarterly Securities Report
Period: Oct 2022 – Dec 2022
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