TOKYO—Coincheck Inc., a Japanese cryptocurrency trading platform operator that was hacked in January, said Tuesday that it has completed compensating customers affected by the hacking and resumed some exchange services.

Coincheck, based in Tokyo, spent ¥46.3 billion ($435 million) to compensate 260,000 customers who had kept a digital currency called NEM at Coincheck. The exchange said 523 million units of NEM were stolen in a cyberattack in January.

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