Ernst & Young ShinNihon LLC

What Ernst & Young ShinNihon LLC does

Ernst & Young ShinNihon LLC is a member firm of the global EY organization and one of the Big Four professional services networks, operating across assurance, consulting, tax, strategy, and transactions. The firm is part of a global network of 400,000+ professionals across 700+ offices in 150+ countries, anchored by Ernst & Young Global Limited as the parent coordinating entity; the US operating entity Ernst & Young LLP houses 57,000 professionals across 70+ locations, while the ShinNihon member firm is the Japan operating vehicle. The firm's product portfolio spans audit and assurance, tax compliance and controversy, transaction advisory (M&A, due diligence, valuation, investment banking) under the EY-Parthenon sub-brand, and consulting across technology, cybersecurity, supply chain, finance, and customer experience via EY Studio+.

The core technology stack centers on the EY.ai platform, backed by a US$1.4 billion investment, which unifies generative, agentic, and neurosymbolic AI capabilities co-developed with NVIDIA and deployed on Dell AI Factory infrastructure running on Microsoft Azure. Adjacent platforms include the US$1 billion, four-year Assurance Technology Platform supporting 160,000+ audit engagements, EY.ai for Risk, EY Telecom.ai agentic solution, EY Tax Copilot (Azure OpenAI), EY.ai Workforce (IBM), and the FedRAMP-authorized EY Grants Accelerator. Major ecosystem partnerships — Microsoft, NVIDIA, SAP, Dell, IBM, CrowdStrike, Zscaler, Databricks, Wolters Kluwer, Shopify, and Blue Planet — extend distribution and embed EY into client technology stacks.

Revenue is generated through professional services engagements and a growing portfolio of managed services (cybersecurity, financial crime, payroll, tax operate, technology). Pricing is quote-based, scoped per engagement, and typically structured as multi-year contracts. Customer segments are horizontal and enterprise-led: large corporations across technology, healthcare, energy, pharma, manufacturing, and government, alongside dedicated practices for private equity, financial services, and family enterprise. Named logos include Microsoft, Medtronic, Xcel Energy, Bristol Myers Squibb, St James's Hospital, CenterPoint Energy, City of Antwerp, and Daikin. Distribution is direct, via relationship-based field sales and sector-aligned teams; the firm has continued capability tuck-in M&A (Dignari 2024, Nuvalence 2024, Tallan 2023) to extend its AI, public-sector, and Microsoft cloud reach.

Name

Ernst & Young ShinNihon LLC

Legal name

Ernst & Young LLP

Website

https://ey.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

Ernst & Young ShinNihon LLC is a Japan-based member firm of the global EY Big Four professional services network, delivering assurance, consulting, tax, strategy, and transaction advisory to enterprise clients across regulated industries via EY.ai and the EY-Parthenon sub-brand.

Ownership category

akta.pro rank

Product category

Professional Services (Audit, Tax, Consulting, and Strategy & Transactions)

NAICS

Management of Companies and Enterprises (551), Other Computer Related Services (541519)

SIC

Services-Engineering, Accounting, Research, Management (8700), Services-Management Consulting Services (8742)

akta.pro primary industry

Financial Reporting & Technical Accounting Advisory (GAAP/IFRS) (BPAHABAF)

akta.pro secondary industries

M&A Advisory (Buy-side/Sell-side) (BPAHADAC), Industry-Specialist / Sector-Focused M&A Advisory (FSAEAGAJ), Intercompany & Consolidation Support (Eliminations, Group Reporting Support) (BPAAAGAG)

Keywords

• Audit assurance services
• Tax advisory consulting
• Management consulting
• Strategy transactions advisory
• Professional services network

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices18 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Professional Services Revenue: EY generates revenue through providing professional services including assurance, consulting, tax, strategy and transactions. Services are delivered across multiple industry sectors and geographies.
2. Managed Services: Recurring managed services offerings including cybersecurity managed services, financial crime operations, forensic managed services, legal managed services, payroll operate, tax and finance operate, and technology managed services

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels8 records

Core offering

Ernst & Young ShinNihon LLC is the Japan-based member firm of EY that delivers integrated professional services spanning audit and assurance, tax, management and technology consulting, and strategy and transaction advisory. The firm serves Japanese corporates, multinational clients operating in Japan, and public-sector organizations through a network of more than 10,000 professionals and the global EY methodology, technology, and industry footprint.

Product overview

EY operates as a global professional services organization offering a comprehensive portfolio of services including Assurance, Consulting, Tax, Strategy and Transactions. The product ecosystem is centered on the EY.ai AI platform (including EY.ai Agentic Platform and EY.ai for Risk), supplemented by specialized AI tools like EY Tax Copilot and EY Grants Accelerator. The EY Parthenon sub-brand unifies strategy and transactions consulting, while EY Studio+ provides integrated customer experience services. EY also offers managed services including cybersecurity (powered by CrowdStrike), and technology transformation services built on partnerships with Microsoft Azure, SAP, NVIDIA, and IBM. The firm has invested over US$1b in its Assurance technology platform and US$1.4b in the EY.ai platform.

Differentiator

Problem solved

Functional benefit

Brands

• EY-Parthenon: Strategy and Transactions service line focused on transformative strategy consulting
• EY.ai
• EY Studio+
• EY wavespace
• EY Metaverse Lab

Products and services

• Audit and Assurance Statutory and voluntary audit services, financial reporting advisory, and assurance engagements aligned with global EY methodology and Japanese regulatory standards for corporates and public-sector entities.
• Tax Services Corporate and international tax compliance, tax planning, and tax-related advisory services covering Japanese tax requirements and cross-border tax structuring through the EY global tax network.
• Consulting Services Management, technology, risk, and operations consulting engagements, including digital transformation, ESG/sustainability advisory, and technology risk services, leveraging EY global methodologies and digital platforms.
• Strategy and Transactions Advisory Corporate strategy, mergers and acquisitions advisory, transaction diligence, valuations, and restructuring services delivered by the EY-Parthenon-aligned strategy and transactions teams in Japan.

Quantifiable outcome

• Enabled personalized care for over 78 million patients through Medtronic supply chain transformation
• +2 more outcomes

Named customers8 records

Segments10 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration12 records

AI capability8 records

Feature5 records

Partnerships

14 partnerships are on record, tiered core, minor and flagship.

• CrowdStrikecoreTechnology or Integration · 1 November 2025EY selected CrowdStrike Falcon Next-Gen SIEM to power global cybersecurity managed services for security and non-security data.
• FedRAMPminorOthers · 1 November 2025EY Grants Accelerator earned FedRAMP authorization enabling federal agencies to modernize grants systems with scalable secure AI solution.
• DatabrickscoreTechnology or Integration · 1 September 2025Launch of Databricks Center of Excellence in Mexico to accelerate AI training, development, and client innovation within EY-Databricks alliance.
• Blue Planet (Ciena Corporation)coreStrategic or Co-development Partner · 18 June 2025Alliance between Blue Planet and EY US to transform future of telecom by accelerating speed to value in AI-driven autonomous networking for communication service providers.
• Dell TechnologiescoreTechnology or Integration · 29 May 2025EY.ai enterprise private powered by Dell Technologies and NVIDIA accelerated computing to deliver enterprise agentic and physical AI at scale.
• NVIDIAflagshipTechnology or Integration · 18 March 2025Collaboration with NVIDIA to create EY.ai Agentic Platform for enterprise AI transformation across tax, risk, and finance domains. EY.ai enterprise private deployment model powered by Dell AI Factory with NVIDIA and EY.ai Agentic Framework.
• SAPcoreTechnology or Integration · 5 March 2025Strategic initiative with SAP and Microsoft to transition to SAP S/4HANA Cloud Private Edition on Microsoft Azure.
• Microsoft AzurecoreTechnology or Integration · 5 March 2025Cloud infrastructure partner for SAP S/4HANA transition and EY.ai platform deployment.
• ZscalercoreStrategic or Co-development Partner · 19 February 2025Strategic alliance between Zscaler and EY US to help secure and simplify digital transformations through cloud-delivered services.
• IBMcoreTechnology or Integration · 10 October 2023Launch of EY.ai Workforce, an AI-powered HR solution enabling organizations to integrate AI into key HR business processes.
• Microsoft Azure OpenAIcoreTechnology or Integration · 14 June 2023EY Tax Copilot powered by Microsoft Azure OpenAI Service to empower EY Tax professionals globally with generative AI capabilities.
• MicrosoftcoreStrategic or Co-development Partner · 20 October 2022Expanded alliance to help businesses achieve net-zero goals through ESG data management offerings supporting operational decarbonization.
• Wolters KluwercoreStrategic or Co-development Partner · 12 April 2022Extension of strategic alliance to include CCH Tagetik corporate performance management solution streamlining extended finance transformations.
• ShopifycoreStrategic or Co-development PartnerEY-Shopify global alliance led by Warren Tomlin for digital transformation of brands and organizations.

Scale indicators9 records

Recent moves8 records

Expansion highlights7 records

Direct peers

• Deloitte: One of the Big 4 global professional services firms offering audit, consulting, tax, and advisory services across 150+ countries. Closest direct peer to EY with overlapping service lines, enterprise client base, and similar global scale and partnership structure.
• KPMG: Big 4 professional services firm operating in audit, tax, and advisory with a global member-firm structure mirroring EY's. Competes head-to-head for enterprise audit, tax, and consulting engagements.
• PwC: Big 4 firm providing assurance, advisory, tax, and consulting services globally. Directly competes with EY across audit, M&A advisory (Strategy&), and managed services with comparable multinational enterprise focus.

Emerging players

• Capgemini: Global IT and consulting services firm competing with EY on digital transformation, cloud, data/AI, and engineering services. Comparable multinational enterprise client base with deeper technology-delivery heritage.
• Cognizant: Global IT and consulting services firm with strong digital, cloud, and AI capabilities. Competes with EY on enterprise application modernization, data analytics, and managed services, though more IT-services-weighted than EY's advisory mix.
• IBM Consulting: Technology-led consulting arm of IBM and strategic EY partner (co-developed EY.ai Workforce). Competes with EY's technology transformation practice on hybrid cloud, AI, and ERP modernization, and is itself a partner ecosystem participant.

Broad incumbents

• McKinsey & Company: Global management consulting firm and direct competitor for EY-Parthenon strategy and transformation work. Comparable target client base (Fortune 500 CEOs) and similar premium-pricing, partner-led model.
• Boston Consulting Group: Global strategy consulting firm competing with EY-Parthenon on corporate and growth strategy mandates, with a growing digital/AI practice (BCG X) that competes with EY.ai and EY Studio+.
• Bain & Company: Global management consulting firm competing with EY-Parthenon for enterprise strategy, M&A, and private equity value creation work, with comparable sector depth and C-suite relationships.
• Accenture: Global professional services firm specializing in strategy, consulting, digital, technology, and operations. Overlaps heavily with EY's consulting and technology transformation practices and frequently competes for the same enterprise transformation mandates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat7 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/EYnews
• YouTubeyoutube.com/@EY_US
• Facebookfacebook.com/EYUSLLP
• LinkedInlinkedin.com/company/ernstandyoung
• Instagraminstagram.com/ey_us

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries14 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Ernst & Young ShinNihon LLC