The reason for this is japanese radios have a different frequency range than australian radios. you;ll have an adapter in series with your radio boosting the frequency of all chanels by 10 or 20Mhz, so if in Aus the station is 102.5, on your radio it will read 82.5, or if the staion is 94.6, the radio will read 84.6 or 74.6, i forget how it works sometimes. but basically it's out by a factor of either 10 or 20MHz because of this converter.