The FujiSankei Business i recently ran a three-part series on the rise and fall of Sahashi. This will be a rehash of events for most readers, but the series drives home the point that Sahashi's hubris brought the company down. Here's Part 1.
The Yomiuri reported earlier this month about allegations of Sahashi using an employee's fund for his own purposes. It looks like the police have enough evidence to launch a criminal investigation into the embezzlement of those funds. Here's the story from the Asahi Shimbun: