Science & Tech · Cybersecurity · 1 hr ago
Keio confirms Qilin claimed responsibility for ransomware attack
Keio Railway confirmed that Qilin claims it carried out a cyberattack on the company group.
The ransomware attack was confirmed on September 26 and caused problems in some group companies’ business systems.
Train services were not affected, according to Keio.
Qilin says it published some information belonging to the group, but Keio has not confirmed whether data was leaked.
Ransomware is malicious software used in attacks that demand payment.
Keio has set up a response team and is working with outside experts and police to investigate how the attack happened and how much was affected.
The company says it will respond promptly if personal information is confirmed to have been exposed.
Keio Railway confirmed that the Qilin cybercrime group claimed responsibility for a ransomware attack on the company group.
Qilin said it had published some information belonging to the Keio group.
Keio said it is investigating whether information was actually leaked.
The attack disrupted sales systems at some group companies but did not affect train operations.
Keio is investigating the attack route and the scope of the damage with outside experts and police.
- Who
- Keio Railway and the Qilin cybercrime group.
- What
- Qilin claimed responsibility for a ransomware attack on the Keio group. Keio confirmed the claim.
- When
- Keio confirmed the claim on October 16, 2026. The attack was confirmed on September 26.
- Where
- Keio Railway Group systems; the specific location of the attack is not stated.
- Why
- Not stated.
This story does not have two clearly opposing sides.
Keio confirmed that it had been hit by a ransomware attack.
Keio said it had confirmed that Qilin claimed responsibility for the attack.
- Attack confirmed
- September 26
- Claim confirmed
- October 16, 2026
- Attacker named
- Qilin
- Systems affected
- Sales systems at some group companies
- Rail services
- No effect on train operations
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