The purpose of this study was to determine how popular utilizing Facebook is in English writing classes. Each of four university classes, totaling 81 first-year students in Japan, was matched up with one of four classes totaling 79 students in Taiwan, the US, Indonesia, and Vietnam. The students engaged in a “cross-culture discussion” for 10 weeks. The popularity of using Facebook was measured by A) A review of the literature, B) Counting the number of words students wrote, and C) Student-teacher questionnaires. It was found that some students—especially English majors—liked using Facebook, while about half of all the non-English majors rarely or never engaged in it. Yet, overall, it is thought that a lot of students improved both their English writing abilities and cross-cultural knowledge by using Facebook.