香港的FM RADIO在日本用唔到嗎?

我在香港買左個MP3 有FM 功能的. 但拎左過離日本就用唔到個FM RADIO.
收唔到訊號. 我想問在日本係唔係用唔到架呀?
部機的資料如下.
●FM RADIO
Radio band(Storage):
Japan Band 20(76-90MHz);
Normal Band 20(87-108MHz)
●Output power:
2W + 2W (RMS, THD=10%)
●Rated:
5V==1A Max
●Distortion:
<0.5% (1kHz, 0.5W)
●S/N ratio:
>80dB (A-Weight)
●Frequency response:
100Hz-20kHz
●Radio response:
76-108MHz
●Power supply:
900mAH rechargeable battery