Fisco, formerly Zaif, is suing Binance for "aiding and abetting" the laundering of some of the $60 million stolen in 2018.
Crypto exchanges Huobi Japan and Fisco were investigated by the country’s Financial Services Agency last week, according to Reuters sources.
Japanese crypto exchange Zaif, which was hacked for $60 million last year, is reinstating all services after being acquired by investment firm Fisco.
Cybersecurity experts from Mitsubishi Group say they may have identified data that could locate the hackers of the Zaif crypto exchange.
After a major hack on the Zaif exchange, its operator has now revealed a refund plan that will see it being taken over by another crypto firm.
Japan's top financial regulator is seeking answers from the operator of the Zaif cryptocurrency exchange.