Commenters on SA responding to Ryuto Kawai might want to look at his profile. He says he is a professional investment manager at Wealthfront.com. Looking at the site however shows he went through a screening process which is pretty minimal. I believe all they do is replicate the manager's portfolio automatically across any accounts that sign up.
The real kicker though is that he only "manages" $89.4k for which he receives 75% of the fee of 0.98%. That calculates to annual earnings of $657.09. The guy seems like he's just put up a simple facade and who knows how he really earns his money.