The U.S. band plan for 2m and 70cm is different from the Japanese plan for those bands. I'm told that Japanese amateur radio rules require that their band plan be hard-coded into the radios. I've seen many stories on social media that boil down to Japanese radios cannot be modified to follow U.S. band plans. Not even the much-discussed "MARS" mod for out of band transmit can fix the Japanese restrictions. Based on this, I would not buy a Japanese-spec radio and expect it to work in the U.S.
Also, the 222 MHz band is a North American-only band. A Japanese-spec radio will not have the 222 MHz band.