Reid has experience spanning international mergers and acquisitions, venture financings, U.S. securities law matters, and international commercial agreements such as core technology licensing contracts. Fluent in Japanese, Reid regularly advises public and private Japanese and American companies in these areas. Prior to joining southgate, Reid practiced as an independent registered foreign lawyer in Japan through Monroe-Sheridan Foreign Law Office from 2014 to 2024. Reid began his career as an associate at Simpson Thacher & Bartlett in New York and Tokyo, where he negotiated contracts and prepared other documentation for derivatives instruments, M&A transactions, and billions of dollars of securities issuances.

Reid is also an Associate Professor at Keio Law School, one of Japan’s top-ranked law schools. Reid’s current and past courses have covered cross-border M&A, startup and venture capital law, international capital markets, and international business contracts.

• “Convertible Equity in the Japanese Startup Ecosystem,” University of Pennsylvania Asian Law Review, Vol. 19, No. 1 (2023)
• “The Woman Next Door,” Kuniko Mukoda (translation by A. Reid Monroe-Sheridan), Kurodahan Press (May 2021)
• “Legal Risks and Mitigation Strategies Relating to Insolvent American Startups,” New Business Law, Vol. 1170 (May 15, 2020) (in Japanese)
• “Promoting Legal Innovation in Japanese Startup Financing,” George Mason Journal of International Commercial Law, Vol. 10, No. 2 (Spring 2019)
• “The Role of a Registered Foreign Lawyer,” Jiyū to Seigi [Freedom and Justice] (Oct. 2018), Japan Federation of Bar Associations (in Japanese)
• “Presentation on the Establishment of the LL.M. in Global Legal Practice at Keio University Law School (with Koji Tsurumi),” in Hōsō Yōsei to Rinshō Kyōiku [Lawyers and Clinical Education] No. 10, pp. 87-92 (March 2018), Nihon Kajo Publishing Co., Ltd. (in Japanese)
• “Analytical Versus Substantive Approaches in American and Japanese Law Schools,” in Comparative Legal Education from Asian Perspective, Keio University Press (2017)
• “Unifying Legal Departments in Global Companies,” Interview with Koji Tsurumi, Mita Hyōron (Dec. 2016), Keio University Press (in Japanese)
• “Substance Overload: A Comparative Examination of Japanese Corporate Governance Law Through the Lens of the Daiwa Bank Case,” Washington International Law Journal, Vol. 24, No. 2 (April 2015)

• “Startups’ Goals for Expansion into the U.S.: Specific Steps for Business Expansion,” Moon Creative Lab Tokyo (Hosted by Stripe, Inc.) (Tokyo, Japan), September 8, 2023 (in Japanese)
• “Careers for US Lawyers in Asia,” Harvard Law School (hosted by Harvard Asia Law Society), online, Nov. 10, 2021
• Guest Lecture on Japanese Law, “Advanced Readings in Japanese Human Rights,” Harvard Law School (Cambridge, Massachusetts, U.S.A., via videoconference), November 17, 2020
• “Basic Legal Knowledge for Seed Funding in Silicon Valley,” Online Seminar (Japan), June 29, 2020
• “Key Legal Knowledge for International Founders in Tokyo,” Tokyo Founders (Tokyo, Japan), November 24, 2019
• “Promoting Legal Innovation in Japanese Startup Financing,” Harvard Law School (Cambridge, Massachusetts, U.S.A.), September 28-29, 2018 (research presentation)
• “Presentation on the Establishment of the LL.M. in Global Legal Practice at Keio University Law School (with Koji Tsurumi),” Meiji University (Tokyo, Japan), “Symposium: From Bridge-Building to Integration: Going Beyond the Philosophy of the Justice System Reform of 2001” (Organized by the Japan Clinical Legal Education Association), Apr. 23, 2017 (in Japanese)
• “A Comparative View of Japanese Corporate Governance and the Daiwa Bank Case,” Melbourne Law School (Melbourne, Australia), February 14, 2017
• “Challenges in Japan-America Crossborder Business Combinations: A Case Study of Tokyo Electron,” Hitotsubashi Graduate School of International Corporate Strategy (Tokyo, Japan), November 2015