Overview
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ZenmuTech,Inc.

ZenmuTech develops and provides data security solutions based on its proprietary AONT secret sharing (secret dispersion) technology 'ZENMU-AONT,' which renders data meaningless by encrypting and splitting it into multiple fragments that individually cannot be reconstructed. Its flagship product, ZENMU Virtual Drive, is a PC endpoint security solution targeting enterprises across financial institutions, consulting firms, and IT vendors, enabling secure remote work and data loss prevention without reliance on encryption keys or passwords. The company also offers ZENMU Engine (SDK) for embedding secret sharing technology into third-party solutions, and QueryAhead, a secure computation solution developed in collaboration with the National Institute of Advanced Industrial Science and Technology (AIST).

Market Cap
¥11.4B
US$72.9M
EV
¥10.7B
US$68.2M
Stock¥4,200▼-11.76%
US$1 = ¥156.80 (2026-10-23)
LTM EV/EBITDA
112.4
x
LTM EV/EBIT
154.9
x
LTM PER
105.8
x
LTM PBR
15.0
x
Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-12.5%pt
10012
Oct 24, 25 – Oct 23, 26StockTOPIX
1Sep 11, 26Change report on large shareholding filed by founder Masao Okazumi (Sept 10)
2Oct 8, 26Data breaches at MrMax HD, GMO subsidiary spark buying in security stocks incl. ZenmuTech
MC → EV Bridge
11.4BUS$72.9MMarket Cap0.12BUS$0.78M+ Debt0.86BUS$5.49M− Cash0.00BUS$0.00M− Inv. Sec.10.7BUS$68.2MEV
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Performance & Balance
Revenue 5Y (¥B)
0.21US$1.33M'21/120.23US$1.48M'22/120.44US$2.81M'23/120.65US$4.14M'24/120.85US$5.43M'25/12
Net Income 5Y (¥B)
-0.05-US$0.32M'21/12-0.12-US$0.73M'22/120.07US$0.47M'23/120.08US$0.50M'24/120.16US$0.99M'25/12
Capital Structure
86%
EquityD/E 0.16xDebt
Liquidity vs Debt 5Y (¥B)▲ Net Cash
CashInv. Sec.Debt
'21/12'22/12'23/120.13US$0.83M'24/120.79US$5.03M0.10US$0.64M'25/12
Shareholders
Top 10 hold 36.7%
1
Masao OKAZUMI
6.96%
2
Segue Group Co.,Ltd.
5.89%
3
Win4 Co., Ltd.
4.66%
4
SBI SECURITIES Co., Ltd.
3.89%
5
Takayoshi TAGUCHI
3.30%
6
Mitsuiwa Corporation
2.93%
7
Izumi MATSUKURA
2.93%
8
Chiyomi TAGUCHI
2.23%
9
Fujitsu Client Computing Limited
2.05%
10
Rakuten Securities, Inc. (Joint Account)
1.91%
Management
8 officers
Yasuhisa ABE
Representative Director, President and CEO
Sep 1996 Joined Oracle Corporation Japan Mar 2008 Joined SAP Japan Co., Ltd. Dec 2011 Joined Amazon Web Services Japan K.K. (now Amazon Web Services Japan G.K.) Feb 2022 Joined the Company as Executive Officer, CMO May 2022 Director, CMO, the Company Jun 2025 Representative Director, President and CEO, the Company (current)
1971-10-16
Shimpei KUNII
Senior Managing Director, COO and CTO
Apr 1983 Joined Toshiba Corporation Oct 2009 Vice President and Head of Taiwan Development Center, Taiwan Toshiba International Procurement Corporation Apr 2016 Joined Pegatron Corporation Oct 2017 Joined the Company May 2018 Director, Head of R&D Division, the Company Mar 2019 Representative Director, President, the Company Sep 2019 Director, CTO and Head of R&D Division, the Company Mar 2020 Senior Managing Director, CTO, CWO and Head of Technology Development Department, the Company Mar 2025 Senior Managing Director, CTO and Head of Technology Development Department, the Company Jun 2025 Senior Managing Director, COO and CTO, the Company (current)
1960-02-07
Shigeki SAKAI
Director, CFO and CWO
Apr 2008 Joined SUS Co., Ltd. Mar 2017 Joined the Company Jan 2020 Manager, Administration Division, the Company Jun 2020 Director, CFO and Head of Administration Department, the Company Mar 2025 Director, CFO, CWO and Head of Administration Department, the Company (current)
1982-12-13
Akiro SHIRAKAWA
Outside Director
Nov 1981 Joined Nihon Godo Finance Co., Ltd. (now Jafco Group Co., Ltd.) Feb 1998 Founded Intelligent Capital Gate Inc., Representative Director (current) May 2000 Founded Tsubasa Hands-On Capital Co., Ltd., Representative Director Mar 2006 Outside Audit and Supervisory Board Member, Canvas Inc. Oct 2006 Director, S.I.P. Co., Ltd. Jun 2012 Director, Will Group, Inc. Apr 2015 Specially Appointed Professor, Institute of Ecological Accounting, Nihon Keizai University Graduate School Jan 2016 Outside Audit and Supervisory Board Member, Mama Square Inc. Sep 2016 Director, Audit and Supervisory Committee Member (Independent Officer), Canvas Inc. (current) Aug 2017 Director, Mama Square Inc. Mar 2021 Outside Director, the Company (current) Oct 2024 Director, Quon Corporation (current)
1955-11-27
Teppei SATO
Director, Audit and Supervisory Committee Member
Apr 1971 Joined Nihon Business Consultant Co., Ltd. (now Hitachi Systems, Ltd.) Apr 2008 Executive Officer, Hitachi Information Systems, Ltd. (now Hitachi Systems, Ltd.) Apr 2011 Director and Senior Managing Executive Officer, Hitachi Information Systems, Ltd. (now Hitachi Systems, Ltd.) Apr 2012 President, Hitachi Systems Engineering & Solutions, Ltd. (now Hitachi Systems Engineering Services, Ltd.) Jun 2014 Advisor, the Company May 2017 Audit and Supervisory Board Member, the Company Oct 2019 Director, the Company Jun 2020 Special Advisor, the Company Mar 2021 Full-time Audit and Supervisory Board Member, the Company Mar 2026 Director, Audit and Supervisory Committee Member, the Company (current)
1948-10-04
Yoshihide TODOROKI
Director, Audit and Supervisory Committee Member
Oct 1989 Joined Asahi Shinwa Audit Corporation (now Azsa LLC) Mar 1993 Registered as Certified Public Accountant Jul 2014 Auditor, Japan Venture Capital Association May 2021 Director, General Research Forum (current) Jul 2021 Established Todoroki CPA Office, Representative (current) Sep 2021 Outside Audit and Supervisory Board Member, MICIN Inc. (current) Oct 2021 Director, Dustnanunoshima Co., Ltd. Apr 2022 Auditor, MICIN Micro Insurance Co., Ltd. (current) Jun 2022 Outside Audit and Supervisory Board Member, ispace, Inc. (current) Nov 2024 Outside Audit and Supervisory Board Member, the Company May 2025 Partner, Crafts Audit Corporation (current) Mar 2026 Outside Director, Audit and Supervisory Committee Member, the Company (current)
1964-08-17
Satoshi TARUMOTO
Director, Audit and Supervisory Committee Member
Oct 2003 Registered as Attorney (Daiichi Tokyo Bar Association); joined Akasaka City Law Office Mar 2009 Outside Director, Rafrain Holdings Co., Ltd. Sep 2015 Audit and Supervisory Board Member, Manamana Inc. Apr 2017 Audit and Supervisory Board Member, Vegetaria Co., Ltd. Mar 2018 Founded Tarumoto Law Office (now Inteas Law Office), Representative Attorney (current) Mar 2018 Representative Director, Mixto Co., Ltd. (current) Jun 2020 Audit and Supervisory Board Member, Neuro Pharmaceuticals Co., Ltd. (current) Jun 2020 Representative Director, National Legacy Gift Association (current) Mar 2022 Outside Audit and Supervisory Board Member, the Company Jul 2025 Representative, Certified Specified Nonprofit Corporation Deai Trade Label Japan (current) Jan 2026 Councilor, Shizenkan University Graduate School (current) Mar 2026 Director, Audit and Supervisory Committee Member, the Company (current)
1977-02-20
Fumiko TAKAYANAGI
Director, Audit and Supervisory Committee Member
Apr 1999 Joined Tokio Marine Fire Insurance Co., Ltd. (now Tokio Marine & Nichido Fire Insurance Co., Ltd.) Dec 2007 Joined Azsa LLC Sep 2011 Registered as Certified Public Accountant Jan 2015 Established Fumiko Takayanagi CPA Office, Director (current) Mar 2016 Registered as Certified Tax Accountant Mar 2016 Established Fumiko Takayanagi Tax Accountant Office, Director (current) Jul 2017 Joined S Network Tax Corporation Sep 2017 Advisor, Takara Printing Co., Ltd. (current) Mar 2019 Full-time Audit and Supervisory Board Member, Active & Company Inc. (current) Aug 2024 Outside Director, the Company Mar 2026 Director, Audit and Supervisory Committee Member, the Company (current)
1976-05-21
Large Shareholding Reports
Masao Okazumi
2026-10-09
5.87%→3.85%
Annual report (as of 2026-06-30): 6.96%
Masao Okazumi
2026-09-10
6.99%→5.87%
Annual report (as of 2026-06-30): 6.96%
Win4 Co., Ltd.
2026-04-23
4.68%
Annual report (as of 2026-06-30): 4.66%
Win4 Co., Ltd.
2026-04-23
4.68%→4.67%
Annual report (as of 2026-06-30): 4.66%
Win4 Co., Ltd.
2026-04-23
4.68%
Annual report (as of 2026-06-30): 4.66%
Zenichi TAGUCHI (Representative Heir: Takayoshi TAGUCHI)
2026-04-23
5.21%→5.21%
Zenichi TAGUCHI (Representative Heir: Takayoshi TAGUCHI)
2026-04-23
5.21%→0.00%
Goldman Sachs International
2026-03-23
5.28%→4.27%
Morgan Stanley MUFG Securities Co., Ltd.
2026-03-05
2.63%→1.90%
Morgan Stanley MUFG Securities Co., Ltd.
2026-02-19
2.63%
Morgan Stanley & Co. International plc
2026-01-08
2.48%→2.46%
Goldman Sachs International
2025-12-22
5.28%
Morgan Stanley MUFG Securities Co., Ltd.
2025-12-19
2.80%
Morgan Stanley & Co. International plc
2025-12-04
3.53%→2.40%
Morgan Stanley & Co. International plc
2025-11-20
4.27%→3.53%
Zenichi TAGUCHI (Representative Heir: Takayoshi TAGUCHI)
2025-11-07
6.13%→5.21%
Morgan Stanley & Co. International plc
2025-11-07
3.30%→4.27%
Zenichi TAGUCHI (Representative Heir: Takayoshi TAGUCHI)
2025-11-07
5.21%→5.21%
Masao OKATSUMI
2025-10-27
8.03%→6.99%
Annual report (as of 2026-06-30): 6.96%
Morgan Stanley & Co. International plc
2025-10-21
3.41%→3.30%
Morgan Stanley & Co. International plc
2025-10-06
3.41%
Segue Group Co., Ltd.
2025-10-01
9.13%→6.86%
Correction filing (name/detail fix only) — ratio carried over from the original filing
Annual report (as of 2026-06-30): 5.89%
Segue Group Co., Ltd.
2025-09-26
9.13%→6.86%
Annual report (as of 2026-06-30): 5.89%
Disclosures
No disclosures
Primary Source Filings
EDINET
2026-10-09
Large Shareholding Report
EDINET
2026-09-10
Large Shareholding Report
EDINET
2026-08-13
Semi-Annual Securities Report
Period: Jan 2026 – Dec 2026
TDnet
2026-05-14
Q1 Earnings Flash
FY ending Dec 2026
EDINETAmended
2026-04-30
Amended Annual Securities Report
Period: Jan 2025 – Dec 2025
EDINET
2026-04-23
Large Shareholding Report
EDINET
2026-04-23
Large Shareholding Report
EDINET
2026-04-23
Large Shareholding Report
EDINET
2026-04-23
Large Shareholding Report
EDINET
2026-04-23
Large Shareholding Report
EDINET
2026-03-27
Annual Securities Report
Period: Jan 2025 – Dec 2025
EDINET
2026-03-23
Large Shareholding Report
EDINET
2026-03-05
Large Shareholding Report
EDINET
2026-02-19
Large Shareholding Report
EDINET
2026-01-08
Large Shareholding Report
EDINET
2025-12-22
Large Shareholding Report
EDINET
2025-12-19
Large Shareholding Report
EDINET
2025-12-04
Large Shareholding Report
EDINET
2025-11-20
Large Shareholding Report
TDnet
2025-11-12
Q3 Earnings Flash
FY ending Dec 2025
EDINET
2025-11-07
Large Shareholding Report
EDINET
2025-11-07
Large Shareholding Report
EDINET
2025-11-07
Large Shareholding Report
EDINET
2025-10-27
Large Shareholding Report
EDINET
2025-10-21
Large Shareholding Report
EDINET
2025-10-06
Large Shareholding Report
EDINETAmended
2025-10-01
Change Report
EDINET
2025-09-26
Large Shareholding Report
EDINET
2025-08-13
Semi-Annual Securities Report
Period: Jan 2025 – Dec 2025
TDnet
2025-05-14
Q1 Earnings Flash
FY ending Dec 2025
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