BACKGROUND: The coronavirus disease 2019 (COVID-19) pandemic has exacerbated mental health problems worldwide; however, research on the stressors experienced by international students during the COVID-19 pandemic remains limited. METHODS: Semi-structured interviews were conducted with 20 international students (male, 8; female, 12; average age, 31.5 years) at Hiroshima University, Japan. Inductive thematic analysis was performed using NVivo software to identify how international students (1) perceived and experienced stress and (2) describe the specific stressors they faced during the COVID-19 pandemic. RESULTS: The findings revealed that international students experienced multiple stressors during the COVID-19 pandemic, including extrapersonal (e.g., financial pressure), interpersonal (e.g., social commentary and perceived xenophobia against foreigners), and intrapersonal (e.g., fear of infection) stressors. CONCLUSIONS: Results revealed that during the COVID-19 pandemic, foreign students experienced stress from various sources. Although this global pandemic has ended, similar public health crises may occur in the future. Examination of the sources of stress faced by international students during the pandemic can help us obtain valuable lessons for responding to future global crises. These findings can provide better policy support, resource allocation, and mental health assistance for the international student community during future crises.