Dr. Sergiy Korsunsky is a Senior Adviser at the Nihon Cyber Defense Co., Ltd. He served as Ambassador of Ukraine to Japan in 2020-2025. Prior to that he served as Director of the Diplomatic Academy of Ukraine in 2017-2020. He holds a diplomatic rank of Ambassador Extraordinary and Plenipotentiary. Ambassador Korsunsky’s previous positions include: Ambassador of Ukraine to Turkey (2008-2016), Director-General of the Economic Department, Ministry of Foreign Affairs (2006-2008); Minister-Counselor and Acting Ambassador at the Embassy of Ukraine in the USA (2000-2005).  

Ambassador Korsunsky has extensive professional experience in strategic planning and development, including security, energy, trade and investment policy, global and regional foreign policy, science and technology. He is a well-known expert on geopolitical issues, economy and security. In 2008 he was awarded by the President of Ukraine for his contribution to economic development of Ukraine and in 2024 by the Parliament of Ukraine for his life-long achievements.