I sure how you enjoy your time in Japan. Luckily, you can enjoy your visit with the DROID BIONIC! Japan uses the same CDMA technology that we use so you'll have access to voice and data services. 4G/LTE is not in Japan so speeds will be comparable to our 3G network. Please take note of our Global tech support number: 908-559-4899, better safe than sorry, you know. You can also see all of the coverage and pricing details online here.