Absolutely, that's why I said "if you can get away with it". There are situations where this is ok - for example, a company user ID. Even for names, it is often

Absolutely, that's why I said "if you can get away with it". There are situations where this is ok - for example, a company user ID. Even for names, it is often perfectly fine to require someone to spell their name with Latin characters. For example, even if your name is officially 鳥山 in Japan, you will have to spell it out as Toriyama when you leave Japan, both in formal and informal settings, on paper just as much as in electronic forms, since no one would be able to understand it otherwise. And similarly, if your name is Smith, in Japan you will often have to spell it (and sometimes even pronounce it) スミス.