Hello @tomojima, we'd be glad to assist you! You will be able to text Japan, but you will be charged pay per use rates. International messages usually cost $0.25 per message sent and $0.20 message received. Check out our page on long distance for prepaid for more information. Thanks for reaching out to us.
Makaela, AT&T Community Specialist.
Need help? Ask a question to get help from the AT&T Community or support from AT&T specialists. If this reply helped you please use Accept solution to mark it as an Accepted Solution.
*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.