Satoshi Hirota specializes in mergers and acquisitions (M&A) and investment transactions, including structuring, legal due diligence, contract negotiation, general corporate legal matters (such as listed company governance), IPO preparation, and dispute resolution, primarily under corporate law. Drawing on his broad business experience—including roles at a major international law firm, as an M&A and finance specialist, and as an investment and management advisor at a private equity fund—he provides legal services that are closely aligned with practical business realities. He also serves as an outside director for a publicly listed company.

Masahiko Shimizu has been a licensed attorney since 2003. During the first decade of his career, he primarily served as legal counsel to financial institutions, securities firms, fund managers, and other institutional investors. His practice focused on capital markets transactions and the structuring of various financial instruments, along with handling numerous legal due diligence matters related to M&A financing.

Since launching his own practice in 2014, Masahiko has continued to provide legal services grounded in his strong financial expertise while broadening his scope to include advisory work for small and medium-sized enterprises (SMEs) seeking IPOs, engaging in M&A transactions, and resolving disputes through both negotiation and litigation.

Ken Takako brings deep expertise in corporate legal practice, particularly in the areas of M&A and finance. He provides comprehensive legal support that includes drafting and reviewing contracts and advising on a wide range of matters involving the Financial Instruments and Exchange Act, the Companies Act, labor and employment law, antitrust law, and intellectual property law. His core strengths lie in M&A transactions—including due diligence, contract negotiation, and post-merger integration—as well as financial regulations affecting securities firms, investment management companies, private equity funds, venture capital, and hedge funds. He also serves as an outside director for several companies.

Yushi Mochizuki joined HCA Law Office in 2020 after practicing at law firms in Tokyo. His work spans a broad range of corporate legal matters, including M&A, business restructuring, litigation, shareholder derivative actions, and labor and employment compliance. He supports startups and established companies alike with practical, business-oriented legal solutions.

Nozomu Yoshimoto joined HCA Law Office in 2021 following the completion of his legal training. He handles a range of corporate legal matters, including M&A, venture support, and commercial litigation, and provides practical advice tailored to clients at various stages of growth.

Kosuke Nakamura joined HCA Law Office in 2022 after gaining experience at a law firm in Nagoya. His practice focuses on general corporate matters, M&A, venture legal support, and litigation, offering practical legal solutions to clients in diverse industries.

Keiichi Yumoto joined HCA Law Office in 2025 after practicing at a law firm in Tokyo. He specializes in general corporate matters, M&A, venture legal support, and litigation, drawing on his extensive professional experience.

Tsutomu Nagai joined HCA Law Office in 2025 after practicing at a law firm in Tokyo. He focuses on providing legal counsel in general corporate matters, M&A, venture legal support, and litigation, assisting clients with diverse legal challenges.