[piaste]

> a domain containing Katakana, something most English keyboards would not be able to type

What browser are you using? Mine (Vivaldi) displays the domain as its standard Punycode ASCII representation:

https://xn--gckvb8fzb.com

[foxfluff]

Here's how it looks for me in Firefox.

https://i.imgur.com/HJxJVJj.png

[throwaway946513]

My Firefox browser shows the punycode as well, potentially something with your configuration? Only Japanese characters that Firefox renders is the name of the tab, URL itself is using the romanized characters.