@landonepps Oh, it never really hit me but kakaku.com is indeed a very interesting case.
As for the other one... Yeah, I mean, of course such domains exist. I just mean I've never seen one used by any notable company, advertiser, service, etc., and in particular I don't think I've ever seen one used on paper/offline with the intention of being typed in.
@marcan Yeah, I've also never seen a notable company use a Unicode domain. I'm pretty sure it's just an SEO hack where they make their domain a common search term.