The Coincheck Inc. exchange, which had about 58 billion yen ($535.03 million) worth of NEM cryptocurrency stolen by hackers, resumed allowing clients to withdraw Japanese yen on Feb. 13.

The Tokyo-based exchange, which disclosed the theft on Jan. 26, also submitted a security plan to the Financial Services Agency the same day.

The agency gave Coincheck that deadline on Jan. 29 when it ordered it to investigate how the heist was pulled off and to compile more robust security measures.

On Feb. 13, a 47-year-old man from Saitama Prefecture said he had confirmed the transfer of about 1.5 million yen into his bank account.

“I was relieved to get a refund of the money as I expected to get just a small amount,” he said.

However, cashing out cryptocurrencies is still suspended.

Coincheck has yet to announce when it will be able to repay around 260,000 owners of the stolen NEM coins a total of 46.3 billion yen.

Finance Minister Taro Aso stressed at a news conference on Feb. 13 that the FSA will place emphasis on measures to bolster the protection of customers.

“We will check how (Coincheck) is addressing the issue of customer protection, and we will make efforts to ensure that,” he said.

The agency is set to ask for additional reports from the exchange if it deems Coincheck’s plan is not up to scratch.

(This article was written by Ken Sakakibara and Takeshi Suezaki.)