Mt. Gox, which was also based in Shibuya like Coincheck, was the victim of another massive cryptocurrency theft back in 2014. It lost between $400 and $480 million from the heist, prompting Japan's legislators to pass a law to regulate bitcoin exchanges. Despite the comparable figures, Coincheck's hack didn't quite affect the market the way Mt. Gox did. Mt. Gox, after all, handled around 80 percent of Bitcoins back in the day when there weren't a lot of exchanges yet. Also, affected Mt. Gox users didn't get their money back.

Coincheck suspended its trading and withdrawal for all cryptocurrencies other than Bitcoin, but the company promised not to run from its customers. It said it will use its own money to reimburse all 260,000 affected users, though it didn't specify when it will start disbursing funds.