On December 6, 2022, Ms. Aiko Ohbuchi and Mr. Masaharu Hamada delivered a guest lecture on “The Whistleblower Protection Act and Whistleblowing Practice in Japan” in the Public Management class (Instructor: Yongjin Chang) in the Faculty of Global Management. Ms. Ohbuchi graduated from the Faculty of Law at Chuo University in 2000 and is a lawyer at Amour Law Office. In her lecture, she emphasized the importance of the whistleblowing system in the ESG (Environment, Social, and Governance) era. She also introduced the Amended Whistleblower Protection Act of 2020 in Japan, which has been in effect since June 2022. The law requires private companies to establish appropriate whistleblower protection systems, such as whistleblowing without fear of retaliation, securing the confidentiality of whistleblowers, and punishment for revealing whistleblowers’ information. Mr. Hamada, who was a whistleblower of a major Japanese company and author of “オリンパスの闇と闘い続けて,” shared his challenging experience of being a whistleblower in Japan and underscored ethical leadership, education, and changing Japanese organizational culture to improve business ethics in Japan.