How have societies in East and Southeast Asia reacted to Russia’s invasion of Ukraine? This open access collection of essays provides preliminary answers from Japan, Thailand, the Philippines, South Korea, Indonesia, Malaysia, Myanmar, and ASEAN. Focusing on press and social media, they reveal that the responses to the war are heterogeneous and may not always agree with the foreign policy stances by the respective governments. The essays are published as Working Paper No. 135 in the East Asian Studies series (Institute of East Asian Studies, University of Duisburg-Essen), edited by DIJ’s David M. Malitz and Surachanee Sriyai (Chulalongkorn University, Bangkok). David’s own paper (“Strong Public Support for the Japanese Responses to the Russian Invasion of Ukraine”) outlines the Japanese government’s economic sanctions, delivery of equipment to Ukraine, and acceptance of Ukrainian refugees. Against the background of the strained Japanese-Russian relations, it explains why the public in Japan has been supportive of Ukraine and of these responses by the government.