Overview
Services

Def consulting,inc.

The company provides hands-on, client-accompanying consulting services across all areas of management, supporting clients from proposal through execution. Its services are organized into three domains: Strategy Consulting (supporting sustainable growth and competitive advantage), Technology Consulting (end-to-end DX support and operational efficiency improvement), and Operations Consulting (business process reform and growth support for sustainable business success). The company operates under a single consulting segment.

Market Cap
¥2.90B
US$18.5M
EV
¥2.59B
US$16.5M
Stock¥40▼-4.76%
US$1 = ¥156.80 (2026-10-23)
LTM EV/EBITDA
NM
LTM EV/EBIT
NM
LTM PER
NM
LTM PBR
1.5
x
Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-84.3%pt
1001
Oct 24, 25 – Oct 23, 26StockTOPIX
1Dec 23, 25Activist reinvestment/shareholder proposal
MC → EV Bridge
2.90BUS$18.5MMarket Cap0.00BUS$0.00M+ Debt0.31BUS$2.00M− Cash0.00BUS$0.00M− Inv. Sec.2.59BUS$16.5MEV
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Performance & Balance
Revenue 5Y (¥B)
1.56US$9.93M'22/30.62US$3.95M'23/30.53US$3.39M'24/30.62US$3.95M'25/30.85US$5.45M'26/3
EBITDA 5Y (¥B)
-0.36-US$2.32M'22/3-0.42-US$2.70M'23/3-0.30-US$1.90M'24/3-0.42-US$2.70M'25/3-0.41-US$2.64M'26/3
Net Income 5Y (¥B)
-0.42-US$2.66M'22/3-0.52-US$3.32M'23/3-0.31-US$1.98M'24/3-0.43-US$2.72M'25/3-2.15-US$13.7M'26/3
Capital Structure
100%
EquityD/E 0.00xDebt
Liquidity vs Debt 5Y (¥B)▲ Net Cash
CashInv. Sec.Debt
0.89US$5.69M0.02US$0.10M'22/30.49US$3.10M0.00US$0.03M'23/30.66US$4.18M'24/30.18US$1.17M'25/30.44US$2.79M'26/3
Shareholders
Top 10 hold 40.3%
1
GP Listed Company Investment D Limited Partnership
21.70%
2
Rakuten Securities, Inc. (Joint Account)
8.33%
3
SBI SECURITIES Co., Ltd.
1.99%
4
Nihon Design Laboratory Ltd.
1.65%
5
Ryosuke SUNAYAMA
1.45%
6
BNYM SA/NV FOR BNYM FOR BNY GCM CLIENT ACCOUNTS M LSCB RD (Standing Proxy: MUFG Bank, Ltd.)
1.24%
7
Japan Securities Finance Co.,Ltd.
1.10%
8
Tsutomu ASANO
0.99%
9
Sei OSHIDA
0.96%
10
Yuta SHIMOMURA
0.89%
Management
5 officers
Yuta SHIMOMURA
Representative Director, President
Apr 2008 Joined Sumitomo Mitsui Banking Corporation Apr 2017 Transferred to Retail Business Promotion Department, same company Apr 2019 Transferred to Asia Business Strategy Department, same company Apr 2020 Internal transfer to Corporate Planning Department, same company Jun 2021 Joined the Company; assumed position of General Manager, Corporate Planning Department Oct 2022 Assumed position of General Manager, Consulting Department, the Company Mar 2023 Assumed position of Representative Director, President, the Company (current)
1985-10-18
Keisuke KAMINOSONO
Director
Apr 2007 Joined Solid Group Holdings Co., Ltd. (currently Redax Co., Ltd.) Oct 2016 Assumed position of Head of Sales, Metropolitan Area, same company Apr 2018 Joined BuySell Technologies Co., Ltd. Mar 2020 Assumed position of General Manager, Inside Sales Business Division, same company Jun 2021 Joined the Company; assumed position of Head of Office of the President Aug 2021 Assumed position of Head of Technology Business Division, the Company Sep 2022 Assumed position of Executive Officer, the Company Mar 2023 Assumed position of Director, the Company (current)
1984-03-14
Masatoshi KANIWA
Director, Audit and Supervisory Committee Member
Apr 2005 Joined Toyo Business Engineering Co., Ltd. (currently Business Engineering Co., Ltd.) Jan 2011 Joined Honma Godo Law Office Jun 2016 Joined Regional Economy Vitalization Corporation of Japan May 2018 Joined FUNDBOOK Inc. (currently fundbook Inc.) Oct 2018 Returned to Honma Godo Law Office Jan 2020 Assumed position of Director, Audit and Supervisory Committee Member, the Company (current) Mar 2023 Joined Ginza Chuo Sogo Law Office (current)
1982-07-05
Keiichi KUBO
Director, Audit and Supervisory Committee Member
Apr 1976 Joined Tohmatsu & Aoki Audit Corporation (currently Deloitte Touche Tohmatsu LLC) Jun 1990 Assumed position of Partner, Tohmatsu Audit Corporation Jun 2007 Assumed position of Member of Management Committee, Tohmatsu Audit Corporation Apr 2009 Assumed position of Representative Director, President, Deloitte Tohmatsu Risk Services Co., Ltd. (currently Deloitte Tohmatsu Risk Advisory LLC) Apr 2012 Assumed position of Visiting Professor, Graduate School of International Accounting, Chuo University Jan 2015 Opened Certified Public Accountant Keiichi Kubo Office (current) Mar 2018 Assumed position of Outside Director, GRCS Inc. (current) Mar 2019 Assumed position of Outside Director, Toa Oil Co., Ltd. Jun 2020 Assumed position of Director, Audit and Supervisory Committee Member, the Company (current)
1953-11-13
Tadachiyo OSADA
Director, Audit and Supervisory Committee Member
Apr 1980 Joined The Mitsubishi Bank, Ltd. (currently MUFG Bank, Ltd.) May 2014 Assumed position of Representative Director and Senior Managing Director, MUFG Bank, Ltd. Jun 2015 Assumed position of Full-time Audit & Supervisory Board Member, Tokyo Kyuko Electric Railway Co., Ltd. (currently Tokyu Corporation) May 2018 Assumed position of Representative Director, T&A Management Co., Ltd. (current) Nov 2018 Assumed position of Outside Audit & Supervisory Board Member, coinbook Inc. (currently BACKSEAT Crypto Asset Exchange Inc.) (current) Nov 2019 Assumed position of Representative Director, Bankers Holdings Co., Ltd. Mar 2022 Assumed position of Auditor, Metaverse Promotion Council (current) Aug 2022 Assumed position of Outside Director, Shinwa Wise Holdings Co., Ltd. (current) Oct 2022 Assumed position of Visiting Professor, Fujita Health University (current) May 2023 Assumed position of Director, Generative AI Utilization Promotion Association (current) Sep 2024 Assumed position of Outside Director, And Do Holdings Co., Ltd. (current) Dec 2025 Assumed position of Director, Audit and Supervisory Committee Member, the Company (current)
1956-10-26
Large Shareholding Reports
Growth Partners Co., Ltd.
2026-07-17
10.85%→26.11%
The Capital Co., Ltd.
2026-02-20
34.55%→16.17%
Growth Partners Co., Ltd.
2026-02-19
10.85%
The Capital Co., Ltd.
2026-02-02
39.88%→34.55%
Evo Fund
2026-01-22
5.84%→2.88%
Evo Fund
2026-01-15
7.48%→5.84%
Evo Fund
2026-01-13
10.04%→7.48%
Evo Fund
2026-01-06
12.65%→10.04%
Evo Fund
2025-12-26
13.93%→12.65%
Evo Fund
2025-12-11
15.37%→13.93%
Evo Fund
2025-12-04
16.50%→15.37%
Evo Fund
2025-11-18
17.56%→16.50%
Evo Fund
2025-11-04
19.45%→17.56%
Evo Fund
2025-10-28
20.87%→19.45%
The Capital Co., Ltd.
2025-10-27
58.80%→39.88%
The Capital Co., Ltd.
2025-10-27
39.88%→39.88%
The Capital Co., Ltd.
2025-10-27
39.88%→39.88%
The Capital Co., Ltd.
2025-10-27
39.88%→39.88%
Evo Fund
2025-10-21
18.65%→20.87%
Evo Fund
2025-10-17
21.14%→18.65%
Evo Fund
2025-10-16
22.46%→21.14%
Evo Fund
2025-10-15
25.00%→22.46%
Evo Fund
2025-10-08
23.40%→25.00%
Evolution Capital Management LLC
2025-10-07
0.00%→0.00%
Correction filing (name/detail fix only) — ratio carried over from the original filing
Evo Fund
2025-10-07
24.87%→23.40%
Evo Fund
2025-10-06
29.86%→24.87%
Evo Fund
2025-10-03
31.24%→29.86%
Evo Fund
2025-10-02
32.63%→31.24%
Evo Fund
2025-10-01
34.51%→32.63%
Evo Fund
2025-09-30
36.73%→34.51%
Evo Fund
2025-09-29
39.96%→36.73%
Evo Fund
2025-09-26
43.30%→39.96%
Evo Fund
2025-09-25
44.39%→43.30%
Evo Fund
2025-09-24
45.58%→44.39%
Evo Fund
2025-09-22
47.29%→45.58%
Evo Fund
2025-09-19
49.59%→47.29%
Evo Fund
2025-09-18
49.59%
The Capital Co., Ltd.
2025-09-17
58.80%→58.80%
Long Corridor Asset Management Limited
2025-09-16
5.46%→0.00%
The Capital Co., Ltd.
2025-09-12
48.05%→58.80%
Evo Fund
2025-09-04
5.21%
Evo Fund
2025-09-04
5.21%→2.20%
Long Corridor Asset Management Limited
2025-09-03
7.90%→5.46%
Long Corridor Asset Management Limited
2025-09-01
13.37%→7.90%
The Capital Co., Ltd.
2025-08-29
53.76%→48.05%
Long Corridor Asset Management Limited
2025-08-27
14.60%→13.37%
Long Corridor Asset Management Limited
2025-08-25
15.55%→14.60%
Long Corridor Asset Management Limited
2025-08-20
16.78%→15.55%
Long Corridor Asset Management Limited
2025-08-08
17.88%→16.78%
Disclosures
No disclosures
Primary Source Filings
TDnet
2026-08-14
Q1 Earnings Flash
FY ending Mar 2027
EDINET
2026-07-17
Large Shareholding Report
EDINET
2026-06-24
Securities Registration Statement
EDINET
2026-06-18
Annual Securities Report
Period: Apr 2025 – Mar 2026
TDnet
2026-05-27
株主総会招集通知
EDINET
2026-02-20
Large Shareholding Report
EDINET
2026-02-19
Large Shareholding Report
TDnet
2026-02-13
Q3 Earnings Flash
FY ending Mar 2026
EDINET
2026-02-02
Large Shareholding Report
EDINET
2026-01-22
Large Shareholding Report
EDINET
2026-01-15
Large Shareholding Report
EDINET
2026-01-13
Large Shareholding Report
EDINET
2026-01-06
Large Shareholding Report
EDINET
2025-12-26
Large Shareholding Report
EDINET
2025-12-11
Large Shareholding Report
EDINET
2025-12-04
Large Shareholding Report
EDINET
2025-11-18
Large Shareholding Report
EDINET
2025-11-14
Semi-Annual Securities Report
Period: Apr 2025 – Mar 2026
EDINET
2025-11-04
Large Shareholding Report
EDINET
2025-10-28
Large Shareholding Report
EDINET
2025-10-27
Large Shareholding Report
EDINET
2025-10-27
Large Shareholding Report
EDINET
2025-10-27
Large Shareholding Report
EDINET
2025-10-27
Large Shareholding Report
EDINET
2025-10-21
Large Shareholding Report
EDINET
2025-10-17
Large Shareholding Report
EDINET
2025-10-16
Large Shareholding Report
EDINET
2025-10-15
Large Shareholding Report
EDINET
2025-10-08
Large Shareholding Report
EDINETAmended
2025-10-07
Change Report
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