United States Forces Japan
Women described as "yellow cabs" can often be observed in so-called "border regions" consisting of highly transient, ethnically and culturally mixed populations. One scholar studying the "yellow cab" phenomenon listed the Roppongi district of Tokyo, United States Forces Japan bases in locations such as Yokosuka, Yokota, Misawa, Iwakuni, Sasebo, and Okinawa as possible locations in Japan, and Hawaii, New York City, and the West Coast in the United States.