The Japanese FM band goes from 76 to 90 MHz (now extended to 95 MHz, which they call "Wide FM"). So that overlaps with the lower portion of our 88-108 MHz FM band. And on AM, Japan (and the rest of the Eastern Hemisphere) uses 9 kHz channel spacing instead of 10 kHz, but many of the frequencies overlap or are close enough to still receive stations.
The Japanese FM band goes from 76 to 90 MHz (now extended to 95 MHz, which they call "Wide FM"). So that overlaps with the lower portion of our 88-108 MHz FM band. And on AM, Japan (and the rest of the Eastern Hemisphere) uses 9 kHz channel spacing instead of 10 kHz, but many of the frequencies overlap or are close enough to still receive stations.