Imported from https://meta.trac.wordpress.org/ticket/2027
Created by @Nao:

Steps to reproduce:

1. Go to your Edit Profile page within a WordCamp.org site.
2. Type in some Japanese characters in any of the name fields. e.g. 高野直子
3. Update profile (save).
4. Check the name field - each character is saved as a question mark.