As the population of 18-year-olds declines in Japan, the number of international students has increased in recent years. This presentation focuses on the impact of ER on international students enrolled in a range of EFL courses at a Japanese university from 2020 to 2024. Sixty-four students from 10 countries participated in 17 classes with Japanese peers. Since 2020, X-Reading has been used online in ER classes, while paper books in others. The reading target varies by class (native books for a fluent student). The presenter will show the reading amount, the series and tasks/activities they liked, and the results of the C-Test. She will include the data on their educational backgrounds and motives for taking English classes. The results from the comprehensive class survey have provided positive support for implementing ER linguistically and/or affectively. Overall, ER conducted in a globalized learning environment created synergy for the international and Japanese students.