Keiichi Hayashi is a senior counsel in the Litigation Department of Morrison Foerster Law Offices. He is a former Justice of the Supreme Court of Japan, where he served for almost four years (April 2017–February 2021). Prior to that, he was a senior diplomat with Japan’s Ministry of Foreign Affairs, where he worked for over 40 years.

A graduate of the Faculty of Law at Kyoto University, he joined the Ministry in 1974, serving for nearly a decade in the Ministry’s Office of Legal Advisors, which he eventually led. In addition, as a diplomat, he was assigned to seven overseas postings, including as Ambassador of Japan to the United Kingdom (2011–2016) and Ireland (2005–2008).