This set is for tourists only and is not designed for use in Japan. This set is not to be used in Japan.
The above is printed on the back of the box for a Sony MP3 Walkman which my stepdaughter received for her birthday. As no power supply is present to charge with, only a USB cable. e.g. voltage differences etc. I am wondering why this text is printed on the box. Googling has failed to turn up an answer. Does anyone know why that text is there?