GMO Internet Group said sorry on Monday.

Cyberattacks caused recent security problems.

The Japanese online service company also promised to stop this from happening again.

It promised to pay the victims.

Chief Executive Masatoshi Kumagai and other leaders bowed deeply.

They did this at a news conference in Tokyo.

This is the custom in Japan.

GMO confirmed an attack on its cloud service.

The service is called Onamae.com Desktop Cloud.

Someone accessed it without permission.

Information leaked out.

Customers saw payments they did not remember making.

The company said the attacks hit dozens of securities firms and other businesses.

There were more than 26,000 cases.

Kumagai said he was very sorry.

He said the company took the problem seriously.

He said GMO had a warning inside the company.

The warning was about a weakness to such attacks.

But the company did not act well.

He is taking a 30% pay cut for three months.

Other top leaders are taking smaller cuts.

GMO promised to pay for the losses.

It will pay 5,000 yen ($30) to all its customers.

This is a kind gesture.

It will also move to a new security system.

The company said the attackers used ransomware.

It said it refused to pay.

GMO is offering $1 million for information.

The information must lead to finding and arresting the attackers.

GMO said it had more than 400 tips as of last week.

The problems at GMO show Japan's cybersecurity weaknesses.

Some experts warn these weaknesses were ignored for years.

This case comes at a time of growing worry about cybersecurity.

Binance is the world's biggest cryptocurrency exchange.

It said on Friday that hackers stole more than $6 billion.

This looks like the largest cryptocurrency theft on record.

Prime Minister Sanae Takaichi has promised to make Japan's cybersecurity stronger.

The effect on GMO's financial results is still unclear.

Its shares have fallen 17.5% so far this year.