Astellas Pharma Executive and Leadership Team

July, 2026

Leadership Overview

Astellas Pharma has 10 executives leading key functions including strategy, finance, marketing, and operations.

Driven by innovation, Astellas Pharma is dedicated to improving global health through the development and delivery of innovative pharmaceuticals, focusing on patient needs and scientific advancement.

Leadership Roles at Astellas Pharma

  • President & Chief Executive Officer - Naoki Okamura
  • Chief Financial Officer - Atsushi Kitamura
  • President & Director - Dewi Koesoema
  • Senior Secretary To President - Ruibo Tang
  • Head of Strategic Collaboration Chief of Staff - Sand'Eria Lewis
  • Chief Marketing Officer & Manager, External Manufacturing Integration - Matthew Brieger
  • Chief Marketing Officer, Lead, Office, Strategic Operations - Kenichi Kazuta
  • Vice President, Chief of Staff for Research and Development, Head of CRDO Office - Tomohiro Kusawake
  • Chief Marketing Officer, Lead Office (Reporting & Analytics) - Dhanush Adiga
  • Associate Director, External Manufacturing Integration - Carmen Watson
  • Naoki Okamura - President & Chief Executive Officer

    Naoki Okamura, the President & Chief Executive Officer at Astellas Pharma, directs the company's overarching strategy and global operations. Overseeing all business units, the President & Chief Executive Officer ensures alignment with the company's mission to improve global health through innovative pharmaceuticals. This leadership role involves driving market expansion and fostering scientific advancement in drug development. By optimizing research and development pipelines, Naoki Okamura directly impacts the company's ability to bring novel treatments to patients worldwide. Ultimately, Okamura secures long-term financial stability and market leadership for Astellas Pharma. The President & Chief Executive Officer's strategic vision guides the manufacturing, marketing, import, and export activities of the organization, ensuring adherence to quality standards and regulatory requirements across all regions.
    Naoki Okamura

    Atsushi Kitamura - Chief Financial Officer

    Atsushi Kitamura, the Chief Financial Officer at Astellas Pharma, manages all financial aspects of the organization. Overseeing fiscal planning and resource allocation, the Chief Financial Officer ensures the company's financial health and sustainability. This critical role involves managing investments, controlling expenditures, and optimizing financial performance to support Astellas Pharma's growth objectives. By analyzing market trends and financial data, Atsushi Kitamura provides strategic insights to guide business decisions. The Chief Financial Officer's responsibilities extend to financial reporting, compliance, and risk management, ensuring transparency and accountability across all operations. Kitamura's leadership ensures that financial strategies directly support the company's mission of delivering innovative pharmaceuticals globally.

    Dewi Koesoema - President & Director

    Dewi Koesoema, the President & Director at Astellas Pharma, holds significant leadership responsibilities within the organization. Overseeing key strategic directives, the President & Director ensures the effective implementation of Astellas Pharma's business objectives. This role involves guiding operational execution and fostering a culture of innovation and compliance across all departments. By driving strategic partnerships and market development, Dewi Koesoema contributes to the company's global expansion and enhanced patient access to pharmaceuticals. Koesoema's leadership is vital in navigating complex market landscapes and ensuring the sustained growth of Astellas Pharma. The President & Director's oversight extends to critical business functions, reinforcing the company's commitment to improving health outcomes worldwide.
    Dewi Koesoema

    Ruibo Tang - Senior Secretary To President

    Ruibo Tang, the Senior Secretary To President at Astellas Pharma, provides essential administrative and strategic support to the President. Managing critical communications and scheduling, the Senior Secretary To President ensures the President's workflow is optimized for maximum efficiency. This role involves coordinating meetings, preparing documentation, and facilitating seamless interaction between the President and other key stakeholders. By maintaining organized records and managing confidential information, Ruibo Tang supports the President's strategic decision-making processes. Tang's dedication ensures that the President can effectively lead Astellas Pharma's mission to improve global health through innovative pharmaceuticals. The Senior Secretary To President acts as a vital liaison, ensuring smooth operational flow within the executive office.

    Sand'Eria Lewis - Head of Strategic Collaboration Chief of Staff

    Sand'Eria Lewis, the Head of Strategic Collaboration Chief of Staff at Astellas Pharma, orchestrates key strategic initiatives and cross-functional collaborations. Overseeing the coordination of high-impact projects, the Head of Strategic Collaboration Chief of Staff ensures seamless execution of Astellas Pharma's long-term vision. This role involves facilitating communication between executive leadership and various departments, driving efficiency in strategic planning and implementation. By managing critical partnerships and alliances, Sand'Eria Lewis enhances the company's market reach and innovation capabilities. Lewis's focus on strategic alignment supports the development and delivery of groundbreaking pharmaceuticals, directly contributing to the company's mission of improving patient lives globally. The Head of Strategic Collaboration Chief of Staff also manages operational workflows to support executive decision-making.

    Matthew Brieger - Chief Marketing Officer & Manager, External Manufacturing Integration

    Matthew Brieger, the Chief Marketing Officer & Manager, External Manufacturing Integration at Astellas Pharma, drives market strategy and oversees external manufacturing operations. Directing all marketing initiatives, the Chief Marketing Officer & Manager, External Manufacturing Integration ensures Astellas Pharma's pharmaceutical products reach target audiences effectively. This dual role involves optimizing brand positioning and managing the integration of external manufacturing processes to enhance supply chain efficiency and product availability. By aligning marketing efforts with manufacturing capabilities, Matthew Brieger supports the company's commitment to delivering innovative treatments. Brieger's leadership ensures that external manufacturing partners meet stringent quality standards, directly contributing to the reliable supply of pharmaceuticals worldwide. The Chief Marketing Officer & Manager, External Manufacturing Integration also focuses on market analysis to identify new opportunities.

    Kenichi Kazuta - Chief Marketing Officer, Lead, Office, Strategic Operations

    Kenichi Kazuta, the Chief Marketing Officer, Lead, Office, Strategic Operations at Astellas Pharma, spearheads strategic marketing efforts and operational excellence. Leading the strategic operations office, the Chief Marketing Officer, Lead, Office, Strategic Operations ensures that marketing strategies are integrated with broader business objectives. This role involves analyzing market dynamics and developing innovative campaigns to promote Astellas Pharma's pharmaceutical portfolio. By driving operational efficiencies within the marketing function, Kenichi Kazuta enhances the company's ability to respond to market demands. Kazuta's leadership supports the effective launch and promotion of new therapies, contributing to improved patient outcomes globally. The Chief Marketing Officer, Lead, Office, Strategic Operations also focuses on optimizing internal processes to support strategic growth.

    Tomohiro Kusawake - Vice President, Chief of Staff for Research and Development, Head of CRDO Office

    Tomohiro Kusawake, the Vice President, Chief of Staff for Research and Development, Head of CRDO Office at Astellas Pharma, directs strategic initiatives within the research and development division. Overseeing the CRDO office, the Vice President, Chief of Staff for Research and Development ensures efficient operations and alignment with R&D goals. This role involves managing critical projects, facilitating communication across R&D teams, and supporting the development of innovative pharmaceutical pipelines. By optimizing R&D processes, Tomohiro Kusawake accelerates the discovery and advancement of new treatments. Kusawake's leadership is crucial for translating scientific breakthroughs into tangible therapeutic solutions, directly supporting Astellas Pharma's mission to improve global health. The Vice President, Chief of Staff for Research and Development also focuses on enhancing collaboration within the R&D ecosystem.

    Dhanush Adiga - Chief Marketing Officer, Lead Office (Reporting & Analytics)

    Dhanush Adiga, the Chief Marketing Officer, Lead Office (Reporting & Analytics) at Astellas Pharma, drives data-informed marketing strategies and performance analysis. Leading the reporting and analytics function within marketing, the Chief Marketing Officer, Lead Office (Reporting & Analytics) ensures that marketing efforts are measurable and optimized for impact. This role involves developing robust reporting frameworks and leveraging data insights to refine campaign effectiveness and identify market trends. By providing critical analytics, Dhanush Adiga supports strategic decision-making across Astellas Pharma's marketing operations. Adiga's expertise in data interpretation enhances the company's ability to understand customer behavior and market dynamics, directly contributing to the successful promotion of innovative pharmaceuticals. The Chief Marketing Officer, Lead Office (Reporting & Analytics) also focuses on enhancing data visualization tools.

    Carmen Watson - Associate Director, External Manufacturing Integration

    Carmen Watson, the Associate Director, External Manufacturing Integration at Astellas Pharma, plays a key role in optimizing external manufacturing processes. Overseeing the integration of external manufacturing partners, the Associate Director, External Manufacturing Integration ensures seamless supply chain operations and product quality. This role involves managing relationships with third-party manufacturers and implementing best practices to enhance efficiency and reliability. By focusing on integration strategies, Carmen Watson supports Astellas Pharma's commitment to delivering high-quality pharmaceuticals to patients globally. Watson's efforts contribute directly to the consistent availability of essential medicines and innovative treatments. The Associate Director, External Manufacturing Integration also works to ensure compliance with regulatory standards across all external manufacturing sites.

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    Frequently Asked Questions Regarding Astellas Pharma Top Executives and Leadership Team

    Who leads Astellas Pharma?
    Astellas Pharma is led by Naoki Okamura (President & Chief Executive Officer), along with executives such as Atsushi Kitamura (Chief Financial Officer) and Dewi Koesoema (President & Director).
    Who is part of Astellas Pharma’s executive team?
    The executive team of Astellas Pharma includes leaders such as Naoki Okamura (President & Chief Executive Officer), Atsushi Kitamura (Chief Financial Officer), Dewi Koesoema (President & Director) and other senior executives.
    How many executives does Astellas Pharma have?
    Astellas Pharma has 10 executives leading key business areas.
    What roles are included in Astellas Pharma’s leadership team?
    The leadership team of Astellas Pharma includes roles such as President & Chief Executive Officer, Chief Financial Officer, President & Director, Senior Secretary To President, Head of Strategic Collaboration Chief of Staff.