Postby maj. tom » October 21st, 2012, 12:40 pm
(From Wikipedia)
The frequency modulation radio broadcast band in Japan is 76-90 MHz. ( If your radio was built this way, but hardly likely, then there is nothing you can do but physically replace the frequency tuner to pick up higher carrier waves.)
Many Japanese radios are designed to be capable of receiving both the Japanese FM band and the CCIR FM band, so that the same model can be sold within Japan or exported.
The radio may cover 76 to 108 MHz, the frequency coverage may be selectable by the user, or during assembly the radio may be set to operate on one band by means of a specially-placed diode or other internal component.
Second-hand automobiles imported from Japan contain a radio designed for the Japanese FM band, and importers often fit a "converter" to down-convert the 87.5 to 107.9 MHz band to the frequencies that the radio can accept.
Most likely your system already has this, so learn some Japanese.