- File naming is more complicated than you might think. Because templates are stored by name in Amazon S3, we are currently conforming to "safe characters" as described here:
The documentation for S3 is a bit confusing, though, because it says elsewhere on that page that UTF-8 is allowed as well. However, UTF-8 characters would violate the "safe characters" recommendation.
For now, template names are limited to the safe characters. I can see why you would want to be able to use Japanese characters in the file names, but as you can tell, it is not currently possible.