The Seventh International Symposium on Arctic Research (ISAR-7) will take place in Tachikawa, Tokyo from March 6 to 10, 2023. We decided to hold ISAR-7 in a hybrid format (partially in-person and partially online) in July when the regulations for foreign visitors entering Japan were complicated with the VISA waiver program stopped under the COVID-19 pandemic situation at that time. The Japanese government announced in late September that the regulations will be revised from October 11, so that the VISA waiver program resumed and those foreigners who experienced three shots of COVID-19 vaccine or with negative certificate of COVID-19 test within 72 hours before the departure of the flight to arrive Japan can enter Japan. We look forward to seeing as many overseas colleagues as before, participate in ISAR-7 in-person sharing research results and ideas on a variety of topics in Arctic. https://www.jcar.org/isar-7/ In ISAR-7, we will discuss how we can find the solutions from studies of various disciplines to the challenge of a rapidly changing Arctic for building a sustainable society. ISAR-7 will consist of ten General Sessions as follows and 24 Special Sessions. Atmosphere; Ocean and sea ice; Rivers, lakes, permafrost and snow cover; Ice sheets, glaciers and ice cores; Terrestrial ecosystems; Marine ecosystems; Geospace; Laws, politics and economy; Culture, Language, and Environment; Engineering for sustainable development.