The Machida City Board of Education had previously created an international exchange class with schools in Australia using web cameras and e-mail in 2007, but because the computer screens were small, conversations were limited to 2-3 students at a time. In addition, the classes were often disrupted due to an unstable connection. This made it difficult for teachers to maintain a steady tempo and for the students to keep their concentration, reducing its effectiveness. According to Professor Sato, the most important requirement of an international understanding class is that it be a "realistic hands-on experience." So they were searching for a device that could enable all the students in the classroom to participate and interact. The HD Visual Communications System was highly regarded as the optimal system for exchange classes. The screen was large enough to fit all the students into the frame, and the image faithfully conveyed the atmosphere of the room. The images and sound were also clear and reflected even the facial expressions and fine nuances of the people on the screen. Stable communications also prevented any interruptions in transmission, so the session could continue at a natural tempo. The HD Visual Communications System was selected because it met these three prerequisites.