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Overview

Information & Communication

S&J Corporation

S&J Co., Ltd. is a Japan-based cybersecurity services company providing consulting, security monitoring/operations (SOC), and incident response services primarily to large and mid-sized enterprises. The company offers a comprehensive suite of services including security advisor engagements, EDR monitoring (MDR), Active Directory monitoring, vulnerability assessments, email security, and its proprietary SIEM platform 'SOC Engine' operated on a 24/365 basis. Its competitive strength lies in combining deep advisory expertise with hands-on incident response experience to deliver actionable threat detection and remediation, underpinned by a stable, high-retention subscription-based revenue model.

Market Cap

¥10.1B

US$64.5M

¥7.94B

US$50.7M

Stock¥1,815▼-11.89%

US$1 = ¥156.80 (2026-10-23)

LTM EV/EBITDA

13.3

LTM EV/EBIT

15.4

LTM PER

26.8

LTM PBR

4.8

Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-9.5%pt

Oct 24, 25 – Oct 23, 26StockTOPIX

1Nov 13, 25Activist shareholder increases stake

2Aug 13, 26Q1 FY2027/03 earnings announced

3Oct 15, 26CoreWeave Shock: Nikkei plunges 3,318 pts amid AI credit concerns hitting semiconductor stocks

MC → EV Bridge

AI Briefing

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Performance & Balance

Revenue 5Y (¥B)

EBITDA 5Y (¥B)

Net Income 5Y (¥B)

Capital Structure

100%

EquityD/E 0.00xDebt

Liquidity vs Debt 5Y (¥B)▲ Net Cash

CashInv. Sec.Debt

Shareholders

Top 10 hold 78.9%

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

MACNICA, Inc.

37.69%

Nobuo MIWA

18.31%

BNP Co., Ltd.

10.77%

Tsuyoshi ISHIKAWA

4.49%

Keiichiro KINOSHITA

2.50%

Nomura Trust and Banking Co., Ltd. (Investment Trust Account)

1.17%

JPMorgan Securities Japan Co., Ltd.

1.16%

NOMURA PB NOMINEES LIMITED OMNIBUS-MARGIN (CASHPB; Standing Proxy: Nomura Securities Co., Ltd.)

1.11%

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

1.11%

Takao KANDA

0.63%

Management

10 officers

Nobuo MIWA

Representative Director, President

Apr 1985 Joined Sumitomo Rubber Industries, Ltd. Mar 1990 Joined LAC Co., Ltd. Sep 2003 Representative Director, President, LAC Co., Ltd. Jul 2007 Established Kumanomi Planning Co., Ltd.; Representative Director, President Nov 2008 Established S&J Consulting Co., Ltd. (current company); Representative Director, President (current) Sep 2013 Chief Technology Officer, FireEye K.K. (Japanese subsidiary of FireEye, Inc., U.S.) Apr 2017 Chief Information Security Advisor, Ministry of Internal Affairs and Communications Sep 2021 Member, Study Group on Revision of Guidelines on Information Security Policies for Local Governments, Ministry of Internal Affairs and Communications

1961-10-28

Tsuyoshi ISHIKAWA

Director, in charge of Business

Apr 2004 Joined Septeni Co., Ltd. Nov 2005 Joined Mediastick Co., Ltd. Jan 2008 Joined LAC Co., Ltd. Apr 2012 Director, IT Professional Group Co., Ltd. Nov 2012 Joined S&J Consulting Co., Ltd.; Director, General Manager of Sales Department Mar 2017 Director, General Manager of Sales Department (in charge of Sales and Technology) Aug 2017 Director, General Manager of Cybersecurity Business Division and General Manager of Sales Department Apr 2020 Director, General Manager of Sales Department Apr 2026 Director, in charge of Business (current)

1979-06-11

Takayuki UEHARA

Director, General Manager of Security Human Resource Development Department

Apr 1987 Joined Recruit Co., Ltd. Jan 1990 Seconded to Recruit Computer Print Co., Ltd. Apr 1993 Transferred to Recruit Computer Print Co., Ltd. Feb 1994 Joined LAC Co., Ltd. Jun 2015 Joined S&J Consulting Co., Ltd.; General Manager of Consulting Department Aug 2017 General Manager of CSIRT Service Division and General Manager of Consulting Department Jun 2019 Director, General Manager of CSIRT Service Division and General Manager of Consulting Department Apr 2020 Director, General Manager of Consulting Business Division Apr 2024 Director, General Manager of Consulting Department Oct 2024 Director, General Manager of Security Professional Service Department Apr 2026 Director, General Manager of Security Human Resource Development Department (current)

1968-05-23

Yohei KYODA

Director, General Manager of Administration Department

Apr 2001 Joined Hokuriku Bank, Ltd. Oct 2004 Joined Nihon Houzing Co., Ltd. Jun 2015 Joined Hasegawa Holdings Co., Ltd. (now HITOWA Holdings Co., Ltd.) Mar 2016 Joined TSP Taiyo Co., Ltd. Apr 2017 Joined S&J Consulting Co., Ltd. Apr 2019 General Manager in charge of Accounting, Management Administration Division Jul 2021 General Manager of Administration Department Jun 2022 Director, General Manager of Administration Department (current)

1979-02-20

Koichi HANZAWA

Director, in charge of Technology; Deputy General Manager, Security Resilience Department

Apr 2006 Joined LAC Co., Ltd. Jan 2014 Joined S&J Consulting Co., Ltd. Dec 2014 General Manager of Cybersecurity R&D Department Apr 2023 Executive Officer, General Manager of Core Technology Department Jun 2023 Director, General Manager of Core Technology Department Oct 2024 Director, General Manager of Core Technology Department; Deputy General Manager, Security Professional Service Department Sep 2025 Director, General Manager of Core Technology Department Apr 2026 Director, in charge of Technology; Deputy General Manager, Security Resilience Department (current)

1983-11-25

Takashi HOSHINO

Director

Apr 2008 Joined Macnica, Inc. Apr 2008 Seconded to Macnica Networks Corp. (now Macnica, Inc.) Jul 2017 Director, iSecurity Inc. Apr 2019 General Manager, Second Sales Division, Macnica Networks Corp. Nov 2019 Director (part-time), Networld Corp. (current) Jun 2020 Director, S&J Consulting Co., Ltd. (current) Oct 2021 General Manager, Second Sales Division, Networks Company, Macnica, Inc. Apr 2022 Vice President, Networks Company, Macnica, Inc. (current)

1984-10-27

Kenichi OMOMO

Director, Full-time Audit and Supervisory Committee Member

Apr 1973 Joined Arabian Oil Co., Ltd. Aug 2000 Joined CEC Co., Ltd. Feb 2006 Director, Bio One Co., Ltd. Jun 2007 Joined Sinbio Pharmaceutical Co., Ltd. Oct 2007 Joined CEC Co., Ltd. Feb 2008 Auditor, Konica Minolta Biscom Co., Ltd. Aug 2014 Joined Japan Mortgage Service Co., Ltd. Jun 2017 Full-time Auditor, S&J Consulting Co., Ltd. Jun 2018 Director, Full-time Audit and Supervisory Committee Member, S&J Consulting Co., Ltd. Dec 2019 Full-time Auditor, S&J Consulting Co., Ltd. Mar 2020 Part-time Auditor, Trend Express Co., Ltd. (now NOVARCA Co., Ltd.) (current) Jun 2022 Director, Audit and Supervisory Committee Member (current)

1950-02-06

Ryohei TANII

Director, Audit and Supervisory Committee Member

Jan 2002 Joined Tax Accountant Junichi HAMAHIRA Office Jan 2014 Joined Nihonbashi Tax Corporation H&S Partners (incorporation of Tax Accountant Junichi HAMAHIRA Office) Mar 2017 Part-time Auditor, S&J Consulting Co., Ltd. Jun 2018 Part-time Director, Audit and Supervisory Committee Member, S&J Consulting Co., Ltd. Dec 2019 Part-time Auditor, S&J Consulting Co., Ltd. Jun 2022 Part-time Director, Audit and Supervisory Committee Member (current) Sep 2023 Joined Iwao Shoji Co., Ltd. (current)

1978-06-16

Takashige HAYASHI

Director, Audit and Supervisory Committee Member

Apr 1976 Joined Kokudo Sogo Kaihatsu Co., Ltd. Dec 1985 Joined CEC Co., Ltd. Apr 2002 Director (in charge of Accounting and Personnel), CEC Co., Ltd. Apr 2009 Full-time Auditor, CEC Co., Ltd. Apr 2011 Chairperson, Health Insurance Society, CEC Co., Ltd. Sep 2015 Part-time Director, Audit and Supervisory Committee Member, Japan Mortgage Service Co., Ltd. (current) Jun 2022 Part-time Director, Audit and Supervisory Committee Member, S&J Consulting Co., Ltd. (current)

1952-06-04

Toru KAWAI

Director, Audit and Supervisory Committee Member

Apr 1981 Joined Arabian Oil Co., Ltd. Jan 2003 Joined AOC Holdings, Inc. (holding company established through share transfer of Arabian Oil Co., Ltd. and Fuji Oil Co., Ltd.); General Manager of Accounting Department Sep 2010 Seconded to Norske AEDC AS; Vice President Apr 2013 Joined JX Nippon Oil & Exploration Corp. (now ENEOS Xplora Co., Ltd.) Apr 2013 Seconded to Petroleum Exploration Information Center Foundation Apr 2017 Seconded to JX Nippon Oil & Exploration Technical Service Co., Ltd. Jun 2026 Part-time Director, Audit and Supervisory Committee Member, S&J Consulting Co., Ltd. (current)

1957-10-10

Large Shareholding Reports

No filings

Disclosures

No disclosures

Primary Source Filings

TDnet

2026-08-12

Q1 Earnings Flash

FY ending Mar 2027

S&J Corporation

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