@blog in the Ice Cubes Mastodon client on iOS, I just get this JSON response when tapping the user name:
{"subject":"acct:%E4%BD%A0%E5%A5%BD@i18n.viii.fi","links":[{"rel":"self","type":"application\/activity+json","href":"https:\/\/i18n.viii.fi\/%E4%BD%A0%E5%A5%BD"}]}