On February 24, 2022, the Russian military, with support from the Belarusian government, began invading the country of Ukraine. Countries around the world are taking various measures to stop the Russian government, including wide-scale economic sanctions on the Russian and Belarusian governments. This conflict has caused the worst humanitarian crisis since World War II-millions of Ukrainian people are evacuating from Ukraine and becoming refugees. While a large majority of them are fleeing to neighboring European countries, some refugees are heading to other countries around the globe, including Japan.The Japanese government has been criticized for restricting the acceptance of refugees and asylum seekers compared with other developed countries. 1 In 2019, Japan accepted merely 44 refugees from 15 422 cases (acceptance rate: 0.29%). On the other hand, the acceptance rates for Canada, Australia, and Germany were 51.2% (27 168/53 081), 17.3% (5 002/29 109), and 16.1% (53 973/336 380), respectively. 2 Therefore, Japanese mental health professionals generally have fewer experiences in supporting refugees. There are very few Japanese psychiatry-related studies on this topic-PubMed searches ("Japanese refugees mental health" or "Japanese refugees depression" or "Japanese refugees posttraumatic stress disorder [PTSD]") yielded only two original manuscripts. 3,4 With the evolving Ukrainian situation, however, it is an urgent matter for Japanese mental health professionals to better understand the mental health effect of this war on the affected people. Mental health topics are broad-they range from direct trauma exposure (e.g., refugees, deployed responders, and journalists) to the indirect effects of media exposure on mental health to the public, especially in vulnerable populations (e.g., children, those with preexisting mental health conditions). 5 Among them, we are particularly concerned about the three groups of adverse mental health: