There are shows on Japanese TV that feature foreigners, but usually as comic breaks, oddities or curiosities. For example, there's the Beat Takeshi show with a panel of foreigners from all over the world who yell and scream at each other over various issues. Very much like Japan Forum
There have been a few that parlayed that into something more. Like Zomahon (spelling?), the African dude from that show who wrote a book and sold homself as a personality. I met him in the bathroom of a bookstore is Osaka as he entered the toilet. Tiny dude. Looked bigger on TV.
What's the point? Well, there are avenues of success. THis is just another example of how maybe it can be done. But if it were that easy, we'd all be there. Joshaussies post, however brutal, appeared sanguine. Also, learning Japanese as well as you wish before going is nearly impossible. I think you need to be there to acquire those language skills. I think your plan will require more charisma than most can muster.