On an interesting side note, there was a girl I know who was playing the visa game like that, only in Korea rather than Japan. She would hop on over to Japan for a short vacation and then back to Korea for another however long she could.
Anyway, once, right before we stopped keeping in contact, she was pulled over by the Japanese officials at the airport and questioned for playing that game IN KOREA! According to her, they almost didn't let her on the plane back to Korea.
So yes, in Japan playing the visa game is not favorably looked upon.