5. Can I use JP SMART SIM in other countries out of Japan? May 26, 2020 07:32 Updated Unfortunately not. JP SMART SIM is only useable within Japan. Also, data-roaming is not available regarding this matter. Related articles 1. How long does it take for the delivery? 1. What is the documentation requirement of applying for JP SMART SIM? 4. Is there any smartphone including in the plan? 2. What is the Compatible Device of JP Smart Sim? 2. Can I buy JP SMART SIM at any mobile shop?