EY Japan

Ernst & Young Japan is a member firm in the Japan of Ernst & Young and EY Japan G.K., EY's core company in Japan, and EY Japan K.K., the EY internal services company in Japan.


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JP Japan



EY Japan, part of the global Ernst & Young network, comprises several member firms operating independently with no capital ties. The core companies include EY Japan G.K., responsible for coordination with member firms, and EY Japan K.K., providing essential back-office services like IT, human resources, accounting, legal affairs, and compliance operations for each member firm.

The company offers a wide range of services through its member firms, including Assurance, handled by EY New Japan LLC, which serves as the Japan audit firm. The Consulting & Advisory division provides consulting services and financial advisory services through entities like EY Strategy & Consulting K.K., formed by integrating two group companies. Additionally, EY Tax Corporation specializes in Japan Tax Services.

Among the other member firms, EY Law focuses on providing legal services, while New Japan Public Affairs advises the public sector, including national and local governments, on financial, accounting, administrative management, and e-government relations.

While EY Japan has seen significant growth and diversification, it has also seen the disbandment of certain entities, such as the EY Research Institute, a think tank, which ceased its operations in 2017.


Prior to 2017, the Japan area functioned as a single entity within EY's global structure. However, in January 2017, a significant transformation took place as EY Japan K.K. was established as a corporation responsible for overseeing EY member firms in Japan.

With the establishment of EY Japan K.K., the management function previously handled by the New Japan audit firm was separated, allowing for greater focus and efficiency. The move aimed to enhance cooperation among member firms and expedite strategy execution, further solidifying the EY brand's presence in Japan.

In line with the industry trend to reorganise management functions, EY Japan K.K. took on the responsibility of back-office operations for EY Japan's member firms. These operations encompass IT, general affairs, human resources, accounting, risk management, legal affairs, public relations, branding, and procurement. Previously, each member firm independently hired back-office employees for non-IT services, and EY Business Initiative Co., Ltd. managed IT operations solely for IT services. However, EY Japan's organizational reform led to the consolidation of all back-office operations, including IT, under EY Japan K.K.

In 2018, a pivotal step was taken to bring all back-office employees from member firms under the umbrella of EY Japan K.K., further aligning the organisation to provide services to clients more effectively. Simultaneously, EY Business Initiative K.K. was renamed EY Japan, representing the consolidation of back-office operations and emphasizing the unified approach to service delivery.


The mission of EY Japan is to be a leading and trusted provider of professional services, delivering exceptional value to clients, stakeholders, and society as a whole. EY Japan aims to drive innovation, foster growth, and contribute to the sustainable development of businesses and economies in the region. Through its integrated approach, EY Japan strives to help clients navigate complex challenges, seize opportunities, and achieve their strategic objectives with confidence and integrity.

At the core of EY Japan's mission is a commitment to excellence, professionalism, and ethical conduct. The firm seeks to empower its clients and stakeholders by providing actionable insights, innovative solutions, and personalized guidance tailored to their unique needs. EY Japan aims to be a catalyst for positive change, driving progress and transformation across industries and contributing to the advancement of society. With a focus on quality, collaboration, and inclusivity, EY Japan endeavors to make a meaningful and lasting impact in the lives of its clients, employees, and the communities it serves.


The vision of EY Japan is to be a transformative force in the business landscape, inspiring confidence, and driving sustainable growth. As a leading professional services firm, EY Japan aims to be at the forefront of innovation, leveraging cutting-edge technologies and insights to shape the future of industries and economies. The vision is anchored in a commitment to delivering exceptional client experiences, providing strategic guidance that empowers businesses to thrive in an ever-evolving world.

EY Japan envisions fostering a culture of collaboration and inclusivity, bringing together diverse perspectives and talents to address complex challenges and create meaningful impact. The firm strives to be a trusted advisor, recognized for its unwavering dedication to ethics, integrity, and transparency. By embracing emerging opportunities and championing responsible business practices, EY Japan seeks to contribute to a sustainable and inclusive global economy, leaving a lasting legacy of positive change for its clients, employees, and society as a whole.

Key Team

Moriaki Kida (EY Japan Chairperson & CEO, Japan Regional Managing Partner (RMP))

Karyn Twaronite (EY Global Vice Chair - Diversity, Equity & Inclusiveness)

Trent Henry (EY Global Vice Chair – Talent)

Shinichiro Uzawa (People Advisory Services Leader; Partner, EY Strategy & Consulting Co., Ltd.)

Yoichi Taguchi (EY Japan People Advisory Services (PAS) System Leader, EY Japan Advisory Partner)

Megumi Fujii (Partner, EY Japan People Advisory Services Global Mobility Leader, Ernst & Young Tax Co.)

Yuji Nomura (Partner, People Advisory Services (PAS), EY Strategy & Consulting Co., Ltd.)

Keisuke Takayanagi (EY Japan, People Advisory Services, Talent, Director)

Yoshito Kijima (EY Japan Immigration Service Leader; Partner, People Advisory Services, EY Immigration Co.)

Steve Krouskos (EY Global Managing Partner – Business Enablement)

Andy Baldwin (EY Global Managing Partner – Client Service)

Julie Boland (EY Americas Area Managing Partner and EY US Chair and Managing Partner)

Gillian Hinde (EY Global Corporate Responsibility Leader)

Karen Hopkins (EY Global Brand, Marketing and Communications Leader)

Tatsuro Shirakawa (Director of Strategy)

Recognition and Awards
In 2023, the company was recognized with the prestigious "Global Good Company of the Year - Bronze" and "Educational Excellence - Silver" awards at the Global Good Awards. Additionally, EY Japan was honored as the Microsoft 2023 Global Sustainability Changemaker Partner of the Year and received the 2023 International CSR Excellence Award for Corporate Citizenship. Furthermore, EY Japan's dedication to making a positive social impact was acknowledged when it became a finalist for the 2023 SAP Pinnacle Award for Social Impact and was awarded the Platinum Catalyst Business Commitment badge in the same year. This commitment to social impact is a testament to the company's ongoing efforts to create positive change and contribute to the betterment of society. The accolades for EY Japan extend beyond the recent years, as evidenced by its recognition in 2022, where the company received the SAP Pinnacle Award for Social Impact and won the "Most Impactful Business Partner" title at the Life Terra Climate Action Awards. Additionally, EY Japan received the "Technology for Good - Silver" award at the Global Good Awards and was honored with the "We Excel in Sustainability" title at Chiesi Vendor Day Italy. EY Japan's dedication to social responsibility is further exemplified by its recognition in various regions, including the USA, Hong Kong, Singapore, and Korea. The company received the 2022 Microsoft USA Inclusion Changemaker Award for its EY STEM App and won the "Best ESG Strategy" award at the Human Resources Online Employee Experience Awards in Hong Kong. In Singapore, EY Japan was honored as the "Champion of Good" by the Singapore National Volunteer And Philanthropy Centre.

Products and Services

Assurance Services: EY Japan provides comprehensive assurance services to help businesses gain confidence in their financial reporting and internal controls. The firm's experienced auditors conduct independent assessments of financial statements, ensuring accuracy, reliability, and compliance with regulatory requirements. Additionally, EY Japan offers audit-related services, including financial due diligence, risk assessments, and fraud investigations, helping clients make informed business decisions.

Tax Services: EY Japan's tax professionals assist clients in optimizing their tax strategies and compliance efforts. They offer a range of tax services, including corporate tax planning, international tax advisory, transfer pricing, and indirect tax solutions. By staying up-to-date with the latest tax regulations and insights, EY Japan helps businesses proactively manage their tax risks and identify opportunities for tax savings.

Consulting & Advisory: EY Japan's consulting and advisory services empower organizations to transform and innovate. Through strategic insights and data-driven analysis, EY Japan helps clients enhance their business processes, improve operational efficiency, and drive digital transformation. The firm offers expertise in areas such as cybersecurity, supply chain management, technology implementation, and business strategy, enabling clients to stay competitive in dynamic markets.

Transaction Advisory: EY Japan assists clients throughout the lifecycle of transactions, providing support for mergers, acquisitions, divestitures, and restructuring. The firm's transaction professionals offer due diligence, valuation, and integration services, helping clients navigate complex deals and achieve their growth objectives.

Other Services: Beyond the core offerings, EY Japan also provides specialized services, including legal services through EY Law, public affairs advisory through New Japan Public Affairs, and internal back-office services through EY Japan K.K. These services complement the firm's holistic approach to addressing the unique needs and challenges faced by its diverse clientele.

EY Japan
Leadership team

Moriaki Kida (EY Japan Chairperson & CEO, Japan Regional Managing Partner (RMP))

Karyn Twaronite (EY Global Vice Chair - Diversity, Equity & Inclusiveness)

Trent Henry (EY Global Vice Chair – Talent)

Shinichiro Uzawa (People Advisory Services Leader; Partner, EY Strategy & Consulting Co., Ltd.)

Yoichi Taguchi (EY Japan People Advisory Services (PAS) System Leader, EY Japan Advisory Partner)


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Products/ Services
Assurance, tax advisory, digital strategy, strategy consulting, financial advisory, legal
EY Japan Co., Ltd. Tokyo Midtown Hibiya, Hibiya Mitsui Tower, 1-1-2 Yurakucho, Chiyoda-ku, Tokyo 100-0006
Company Type
Private company limited by shares or Ltd
Company Registration
OC300001 (EY)
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