Immigration authorities have detained two female Chinese students from Sakata Junior College in Yamagata Prefecture after they were found working at a Tokyo sex parlor, immigration officials said Monday.
The two, aged 25 and 30, were held on suspicion of engaging in activities prohibited by their visa during a Jan. 10 raid on the parlor in the Kabukicho district in the capital's Shinjuku Ward, according to the Tokyo immigration bureau.
Another female Chinese student from the college was detained by the bureau last year after it learned she was working as a hostess.
The two-year management college, which caters to Chinese, has had truancy problems since closing its Tokyo campus last month. It said earlier this month that 136 of its 198 Chinese students ignored a request to transfer to its main campus.