User blog comment:Jiyori0chan/Permission from Jin/@comment-4238265-20130218164237

Usually, I don't think people ask for permission for a parody project :/. They usually just credit the person who original created it.

Anyway, if you really want to ask for permission, you should get someone who can speak Japanese, at least. I'm not so sure about Jins' use for the English language. I never heard IA and Miku sing in 'Engrish' in any of his songs...