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Overview

Precision Instruments

RIKEN KEIKI CO.,LTD.

Riken Keiki is a pioneer in gas detection and gas alarm equipment, offering over 100 types of gas detection and environmental measurement products. The company serves industrial workplaces globally, providing solutions aimed at ensuring safe working environments. In addition to manufacturing and selling gas detection devices, the group also offers after-maintenance services for its installed equipment base.

Market Cap

¥153B

US$977M

¥118B

US$752M

Stock¥3,370▼-0.44%

US$1 = ¥156.80 (2026-10-23)

LTM EV/EBITDA

8.2

LTM EV/EBIT

9.4

LTM PER

15.0

LTM PBR

1.8

Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-26.8%pt

Oct 24, 25 – Oct 23, 26StockTOPIX

1Aug 10, 26Q1 FY2027/03 earnings announced

MC → EV Bridge

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Performance & Balance

Revenue 5Y (¥B)

EBITDA 5Y (¥B)

Net Income 5Y (¥B)

Capital Structure

96%

EquityD/E 0.05xDebt

Liquidity vs Debt 5Y (¥B)▲ Net Cash

CashInv. Sec.Debt

Shareholders

Top 10 hold 52.0%

as of 2026-03-31 · Source: Annual Securities Report

The Master Trust Bank of Japan, Ltd. (Trust Account)

9.32%

STATE STREET BANK AND TRUST COMPANY 505001 (Standing Proxy: Mizuho Bank, Ltd.)

9.22%

Custody Bank of Japan, Ltd. (Trust Account)

5.62%

BANK LOMBARD ODIER AND CO LTD GENEVA (Standing Proxy: MUFG Bank, Ltd.)

5.31%

The Dai-ichi Life Insurance Company, Limited

5.28%

RIKEN KEIKI CO.,LTD. Stock Ownership Association

4.36%

Mizuho Bank, Ltd.

3.96%

NAGANO KEIKI CO.,LTD.

3.13%

Sumitomo Mitsui Banking Corporation

2.92%

BNYM AS AGT/CLTS 10 PERCENT (Standing Proxy: MUFG Bank, Ltd.)

2.88%

Management

7 officers

Tetsuya MATSUMOTO

Representative Director, President

Apr 1987 Joined the Company Jul 2006 Executive Officer, General Manager of Accounting Department and Concurrently General Manager of Management Audit Office Mar 2007 Executive Officer, General Manager of Accounting Department, Administration Division and Concurrently General Manager of President's Office Jun 2009 Director, Executive Officer, General Manager of General Affairs Department, Administration Division and Concurrently General Manager of Management Planning Office Jul 2009 Deputy General Manager, Administration Division Apr 2014 General Manager, Administration Division Jun 2017 Director, Managing Executive Officer Oct 2018 Representative Director, President, Riken Keiki Nara Seisakusho Co., Ltd. Apr 2021 General Manager, Production Division and Concurrently General Manager of Production Control Department Apr 2022 General Manager, Production Division Apr 2023 Representative Director, President (current)

1964-10-13

Shinya KOFU

Director, Managing Executive Officer, General Manager of Sales Division

Apr 1984 Joined the Company Mar 2010 General Manager, No. 1 Sales Department, Sales Division Apr 2011 General Manager, East Japan Sales Department, Sales Division Apr 2014 Executive Officer, Deputy General Manager, Sales Division Jan 2017 General Manager, Sales Division Jun 2017 Director (current) Jun 2018 General Manager, Overseas Sales Department Jun 2021 Managing Executive Officer, General Manager of Sales Division (current)

1960-09-29

Shoji KIZAKI

Director, Executive Officer, General Manager of Production Division

Apr 1986 Joined the Company Apr 2014 General Manager, Custom Engineering Department, Technology Development Division Jun 2016 Executive Officer (current) Apr 2018 Deputy General Manager, Technology Development Division Apr 2019 General Manager, Technology Development Division Jun 2019 Director (current) Apr 2024 General Manager, Production Division and Concurrently General Manager of No. 2 Manufacturing Department Sep 2024 Chairman, Riken Keiki (Changzhou) Electronic Technology Co., Ltd. (current) Apr 2025 General Manager, Production Division (current)

1962-10-23

Nobuo NAKANO

Director (Full-time Audit and Supervisory Committee Member)

Apr 1977 Joined the Company Mar 2006 General Manager, Research Department, Technology Development Division Jun 2007 Executive Officer Jun 2011 Director Jan 2012 General Manager, MRD Office, Sales Division Apr 2014 General Manager, Quality Control Center Jun 2015 Director (Full-time Audit and Supervisory Committee Member) (current)

1953-06-15

Michimasa TAGA

Outside Director, Audit and Supervisory Committee Member

Apr 1978 Joined Misawa Homes Co., Ltd. Jun 1993 Director, Misawa Resort Co., Ltd. Jun 2003 Director, Executive Officer, Misawa Homes Co., Ltd. Aug 2003 Executive Officer, General Manager of Housing Business Strategy Department, Misawa Homes Holdings Inc. Jun 2005 Director, General Manager of Central Block Division and General Manager of Sales Promotion Department, Misawa Homes Holdings Inc. Jun 2009 Director, Executive Officer, Resort Solutions Co., Ltd. (now Resol Holdings Co., Ltd.) Jun 2012 Representative Director, President and Executive Officer, Resort Solutions Co., Ltd. Jun 2019 Outside Director, Audit and Supervisory Committee Member, the Company (current)

1953-03-28

Yasuko UEMATSU

Outside Director, Audit and Supervisory Committee Member

Oct 2004 Registered with Dai-Ichi Tokyo Bar Association Nov 2004 Joined City Law Office Aug 2014 Partner, City Law Office Jun 2021 Outside Director, Audit and Supervisory Committee Member, the Company Jan 2024 Joined Rex Law Office (now TXL Law Office) (current)

1977-05-07

Shuichi TAKEMOTO

Outside Director, Audit and Supervisory Committee Member

Apr 1982 Joined Fuji Bank, Ltd. (now Mizuho Bank, Ltd.) Oct 2004 General Manager, Human Resources Department, Mizuho Information & Research Institute, Inc. (now Mizuho Research & Technologies, Ltd.) Apr 2008 General Manager, Fukuoka Branch, Mizuho Bank, Ltd. Oct 2009 General Manager, IT & Systems Division, Mizuho Trust & Banking Co., Ltd. Apr 2010 Executive Officer, General Manager, IT & Systems Division, Mizuho Trust & Banking Co., Ltd. Apr 2011 Managing Executive Officer, Mizuho Trust & Banking Co., Ltd. Apr 2013 Managing Executive Officer, Mizuho Trust & Banking Co., Ltd., and Concurrently Managing Executive Officer, Mizuho Financial Group, Inc. Apr 2014 Deputy President, Director, Mizuho Private Wealth Management Co., Ltd. Apr 2017 Executive Officer, Mizuho Trust & Banking Co., Ltd. Jun 2017 Outside Full-time Audit & Supervisory Board Member, Nissan Chemical Corporation Jun 2025 Outside Director, Audit and Supervisory Committee Member, the Company (current)

1960-01-05

Large Shareholding Reports

Forest Manor N.V.

2026-05-18

5.50%→4.48%

Sumitomo Mitsui DS Asset Management Company, Limited

2026-03-23

3.98%→5.05%