uh --- if you look at the Bloomberg article, it specifically points out that:
1) He is a "prolific day trader" - the second line of the article
2) that it's his assets, in that his name "appears in mandatory shareholder filings" - as they did for guys like BNF / Takeshi Kotegawa, where apparently in the Japanese markets like in the west they have specific Record Dates where as long as you own the shares on that particular day, you'd be eligible for dividends -- to the best of my knowledge they don't write company employees' names as the actual shareholders if they are hired to run OPM, other peoples money
3) He says he "lost about 8 billion yen," equiv to USD$75 million in the last month, or around "20%" of his assets. Bloomberg updated the story about 4 hours after it was originally published, to show that he has around 45 billion yen in total (USD$420 million).
4) They reiterate again that it's his own money, in that after he worked as an employee overseas, but then returned to Japan "in 2013 to go it alone"
So what if he doesn't always sell at 3pm Tokyo time when the TSE closes every single day for every stock he owns
The fact is that as Bloomberg reports, he trades actively ("prolific day trader"), is not an employee of any firm & the hundreds of millions USD is all his
