The stolen cryptocurrency was worth 58 billion yen at the time of detection, or roughly $534.8 million, according to the Coincheck. Hackers robbed a hundred million dollars' worth of cryptocurrency recently.
Morgan Stanley says an estimated more than $630 million in bitcoin had been lost to hackers during mid-December.
Below is a related article about the hacker theft.
http://www.pcgamer.com/over-500-million-in-cryptocurrency-stolen