What Deloitte & Touche does

Deloitte Tohmatsu LLC (有限責任監査法人トーマツ), operating under the English brand Deloitte & Touche, is Japan's largest Big4 audit firm by audit revenue and the Japanese member firm of Deloitte Touche Tohmatsu Limited (DTTL). Founded in 1968 as Japan's first nationwide audit corporation and headquartered in Tokyo Marunouchi, the firm employs 6,417 staff including 2,828 certified public accountants as of February 2025, and serves as external auditor for 3,187 companies across statutory audits (Financial Instruments and Exchange Act, Companies Act, 学校法人), voluntary engagements, and IPO guidance. Its product portfolio centers on audit and assurance, risk advisory, financial advisory, IPO support, IFRS advisory, public sector services, and digital technology assurance, delivered through a network of 17 main offices and 12 liaison offices in 30 cities across Japan. The firm has proprietary AI audit tools including a patented fraud detection model (AIによる不正検知モデル), AS Chat AI (generative AI), AS Text Reviewer (NLP), AS Knowledge (integrated data platform), and the AIDC delivery center, layered on top of globally shared Deloitte methodologies.

The broader Deloitte Tohmatsu Group in Japan encompasses consulting, financial advisory, tax, legal, and risk advisory affiliates, employing approximately 22,000 professionals with group revenue of ¥362,705 million as of 2025. The firm operates within a professional services partnership model governed by its partners and employees, with no public equity. Its go-to-market is partner-led, relationship-based engagement supplemented by competitive bidding for government contracts (e.g., $249M U.S. Army OIB Modernization contract). Pricing is engagement-based and not publicly disclosed. Recent strategic moves include the acquisition of three technology services firms (smooth Co., Forbes Co., Arena System) between 2024 and 2025, the merger of three consulting/financial advisory/risk advisory subsidiaries effective December 1, 2025 forming a 11,000+ professional entity, and technology partnerships with IBM/Red Hat and OpenLegacy Japan extending capability into software supply chain security and mainframe modernization.

Name

Deloitte & Touche

Legal name

有限責任監査法人トーマツ

Website

https://recruit.tohmatsu.co.jp

Company type

Private

Founded year

1968

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

Deloitte Tohmatsu LLC (Deloitte & Touche) is Japan's largest Big4 audit firm, providing statutory audit, IPO advisory, risk advisory, and digital technology assurance services to 3,187 corporate clients across 30 domestic offices, with proprietary AI audit tools and affiliation to the global Deloitte network.

Ownership category

akta.pro rank

Product category

Audit and Professional Services

NAICS

Offices of Certified Public Accountants (541211), Management Consulting Services (54161)

SIC

Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Audit & Assurance Services (BPAHABAA)

akta.pro secondary industries

ESG Governance, Sustainability Reporting & Assurance Advisory (BPAHAFAJ), ESG Data Platforms, Controls & Audit Readiness (Data quality, internal controls) (EUAHAJAN)

Keywords

• Audit assurance services
• Financial statement audits
• Risk advisory consulting
• IPO advisory services
• ESG sustainability assurance

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices32 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Audit and Assurance Services: Statutory financial statement audits under the Financial Instruments and Exchange Act and Companies Act, internal control audits, school法人 audits, and other statutory and voluntary audit engagements. Deloitte Tohmatsu serves as independent auditor for hundreds of publicly listed companies.
2. Risk Advisory Services: Risk management, internal control advisory, and consulting services helping clients address various business risks.
3. Digital Technology Assurance: IT risk-related audit, assurance, and advisory services covering cybersecurity, AI, and emerging digital risks for enterprise clients.
4. IPO and Capital Markets Advisory: Support for companies pursuing initial public offerings, including internal control establishment and accounting framework preparation.
5. Sustainability/ESG Assurance: Non-financial disclosure assurance services including TCFD, CSRD compliance, and ESG data verification.
6. Government/Public Sector Services: Audit and advisory services for government agencies, municipalities, and public sector organizations.

Go-to-market motion2 records

Distribution channels5 records

Marketing channels7 records

Core offering

Deloitte & Touche (Deloitte Tohmatsu LLC) is Japan's largest audit firm and a member of the Big4, providing statutory financial statement audits, internal control audits, IPO advisory, IFRS implementation, ESG/sustainability assurance, risk advisory, and digital technology assurance. The firm serves publicly listed companies, financial institutions, government entities, and mid-market enterprises across Japan, leveraging proprietary AI-powered audit tools.

Product overview

Deloitte Tohmatsu offers comprehensive audit and assurance services as Japan's largest audit firm, encompassing statutory financial statement audits, internal control audits, IPO support, risk advisory, and public sector services. The firm provides specialized digital technology assurance and analytics services alongside traditional audit offerings. The portfolio includes proprietary AI-powered audit tools such as the Fraud Detection Model (不正検知モデル) for anomaly detection, AS Chat AI for generative AI-assisted investigation, AS Text Reviewer for NLP-based document analysis, and AS Knowledge for integrated risk assessment. Supporting tools include Balance Gateway for confirmations, AS Vouch for document management, and Deloitte Connect for client communications. The services are delivered through domestic offices in 17 cities and satellite offices in 12 cities across Japan, with access to the global Deloitte network spanning 150+ countries.

Differentiator

Problem solved

Functional benefit

Products and services

• Audit and Assurance Services
• Financial Services Industry Audit and Advisory
• IPO Support Services
• Public Sector Audit and Advisory
• IFRS Advisory Services
• Global Services
• Advisory Services
• Digital Technology Assurance
• Analytics Services
• Sustainability and ESG Assurance
• AI Fraud Detection Model
• Audit Suite Chat AI (AS Chat AI)
• Audit Suite Text Reviewer (AS Text Reviewer)
• Audit Suite Knowledge (AS Knowledge)
• Balance Gateway
• Audit Suite Vouch (AS Vouch)
• Deloitte Connect

Quantifiable outcome

• Audit engagement for 3,187 companies including 799 under Financial Instruments and Exchange Act, 1,094 under Companies Act, as of May 2024
• +2 more outcomes

Named customers28 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability10 records

Feature7 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• IBM / Red Hat (Lightwell Initiative)coreTechnology or Integration · 26 June 2026Deloitte Touche Tohmatsu Ltd. joined IBM and Red Hat's Lightwell initiative, a $5B program with 20,000 engineers launched May 2026 to address open-source software vulnerabilities. Deloitte helps joint customers inventory open-source components, manage patch installation and validation, and support vulnerability remediation. The partnership focuses on regulated software supply chains, helping enterprises detect exploits, report breaches to regulators, and coordinate vulnerability disclosure.
• OpenLegacy Japan Co., Ltd.coreStrategic or Co-development Partner · 28 April 2026Strategic alliance between Deloitte Tohmatsu LLC and OpenLegacy Japan to support modernization of legacy mainframe environments across Japanese enterprises. Combines OpenLegacy's patented API generation platform with Deloitte Tohmatsu's system consulting and implementation capabilities (Application Modernization Studio Tokyo). Partnership addresses Japan's '2035 Cliff' workforce shortage challenge. Deloitte leverages OpenLegacy Hub for bi-directional connections between legacy systems and modern cloud environments, and uses proprietary innoWake tool for COBOL-to-Java conversion. Claims up to 10x reduction in time-to-market and 60% cost reduction.
• Japan Ministry of Economy, Trade and Industry (METI)coreOthersDeloitte Tohmatsu Venture Support serves as Program Secretariat for the METI-sponsored Global South-Japan Tech Talent Internship (GS-JTI) 2026 program, connecting STEM students from Global South countries with Japanese companies for on-site (1.5 months) and online (1 month) internships.
• Uni-Charm Corporation / NTT Docomo BusinessminorStrategic or Co-development PartnerJoint collaboration with Uni-Charm Corporation and NTT Docomo Business to publish final deliverables from Japan's GX League 'Green Market Creation Study Working Group.' Working group defines green products and market frameworks and proposes measures for cross-value-chain collaboration to advance carbon neutrality by 2050.
• Appian Corp.minorStrategic or Co-development PartnerPartnership between Appian Corp. and Deloitte Touche Tohmatsu Ltd. to help unite the UK's decentralized policing ecosystem of 43 geographic forces, enabling real-time data action across crime investigations and case management workflows.
• Samarkand Region, UzbekistanminorOthersSamarkand region and Deloitte Tohmatsu signed a memorandum of understanding at the Tashkent International Investment Forum. Meeting focused on technology transfer, industrial modernization, and cooperation in textiles, electronics, building materials, food, logistics, and tourism sectors, establishing a framework for investment interaction between Samarkand region and Japanese corporations.
• Arena System (acquired)coreTechnology or IntegrationDeloitte Tohmatsu acquired all shares of Arena System, a company supporting ERP implementation, to enhance its business digital transformation support for small and medium-sized enterprises.

Scale indicators10 records

Recent moves6 records

Expansion highlights7 records

Others

• Deloitte Tohmatsu Consulting LLC: Japanese consulting arm of the Deloitte network and sister entity to the audit firm; being merged with financial advisory and risk advisory into a single 11,000+ professional group effective Dec 1, 2025, it represents the immediate cross-sell channel adjacent to the audit franchise.
• Deloitte Touche Tohmatsu Limited (DTTL): Global coordinating entity of the Deloitte network (150+ countries, 460,000 professionals); parent/umbrella organization that provides the global brand, methodologies, and cross-border service capability that the Japanese audit firm relies on.

Direct peers

• Mazars Japan: International audit and advisory network operating in Japan; serves mid-market and inbound foreign-invested clients for statutory audits and cross-border assurance, partially overlapping with Deloitte's global client work in Japan.
• BDO Sanyu & Co. Mid-tier global audit network member in Japan; competes for statutory audits, IPO advisory, and advisory work targeting mid-cap and growth-stage companies in Japan.
• RSM Seiwa (RSM Japan): Mid-tier international audit and advisory network in Japan; provides audit, tax, and consulting services to mid-market and cross-border clients in direct overlap with Deloitte Tohmatsu's broader portfolio.
• Ernst & Young ShinNihon LLC: Big4 audit and assurance member firm in Japan; directly competes with Deloitte Tohmatsu for Financial Instruments and Exchange Act audits, IPO advisory, and ESG assurance across the same listed-company client base.
• Grant Thornton Taiyo ASG: Mid-tier global audit network in Japan; competes for Companies Act audits, IPO guidance, and mid-market assurance work that overlaps with Deloitte Tohmatsu's broader client base outside the largest listed issuers.
• KPMG AZSA LLC: Big4 audit and assurance member firm in Japan; competes head-to-head for statutory audits of listed companies, financial institutions, and IPO mandates using a comparable partner-led engagement model.
• Crowe Higo LLP: Japan-based audit and advisory firm; competes for statutory audits of mid-cap Japanese companies including regional listed issuers that overlap with Deloitte Tohmatsu's regional office network.
• PricewaterhouseCoopers Aarata LLC: Big4 audit member firm in Japan; competing for the same Financial Instruments and Exchange Act audits, internal control audits, and IPO readiness work with overlapping technology-driven audit platforms.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/tohmatsurecruit
• YouTubeyoutube.com/user/deloittejp
• Facebookfacebook.com/Deloitte.Japan
• LinkedInjp.linkedin.com/company/deloitte
• Instagraminstagram.com/lifeatdeloittejapan

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A1 record

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Deloitte & Touche