Japan
JPRansomware victim intelligence profile ยท Ranked #11 globally ยท Updated: Apr 4, 2026
Ransomware Threat Profile: Japan
Japan ranks #11 globally for ransomware attacks, with 195 confirmed victims in this database โ representing 1.2% of the worldwide total. The most active ransomware groups targeting Japan include Qilin, Clop, Ransomhub.
The most frequently targeted industries in Japan are Manufacturing, Technology, Business Services. The healthcare sector is particularly vulnerable because attacks on hospitals and medical providers can create life-threatening situations, increasing pressure to pay ransoms quickly.
Japan's attack volume reflects broader trends in ransomware targeting: the volume of attacks reflects the country's integration into the global economy and the proliferation of ransomware operations that target organisations of all sizes worldwide.
Organisations in Japan should consider the active threat groups documented here when assessing their cybersecurity posture, implementing detection rules, and prioritising incident response planning.
Recent Victims in Japan (20 cached of 195 total)
| # | Organization | Group | Sector | Date |
|---|---|---|---|---|
| 1 | whiskey.co.jp | Krybit | Consumer Services | Apr 3, 2026 |
| 2 | Nippon Medical School Musashi Kosugi Hospital | Netrunner | Healthcare | Apr 3, 2026 |
| 3 | Shiraume Hospital | Netrunner | Healthcare | Apr 3, 2026 |
| 4 | Nissan | Everest | Manufacturing | Apr 1, 2026 |
| 5 | CERUMO Co., Ltd | Nightspire | โ | Mar 31, 2026 |
| 6 | OTNet | Nightspire | โ | Mar 28, 2026 |
| 7 | jaxa.jp | Alp-001 | Technology | Mar 26, 2026 |
| 8 | Nafco | Akira | โ | Mar 23, 2026 |
| 9 | Omikenshi | Thegentlemen | Manufacturing | Mar 23, 2026 |
| 10 | MEDICUS SHUPPAN | Thegentlemen | Healthcare | Mar 21, 2026 |
| 11 | sopower.com | Dragonforce | Energy | Mar 20, 2026 |
| 12 | TSN Co., Ltd. | Worldleaks | โ | Mar 20, 2026 |
| 13 | Chase Asia | Thegentlemen | Financial Services | Mar 16, 2026 |
| 14 | Donjon | Akira | โ | Mar 5, 2026 |
| 15 | Promotion Management Center | Ailock | Business Services | Mar 3, 2026 |
| 16 | UD Trucks | Everest | Manufacturing | Feb 28, 2026 |
| 17 | JA AKITA KITA LIFE SERVICE, K.K | Incransom | โ | Feb 26, 2026 |
| 18 | Advanced Connection Corporation | Thegentlemen | โ | Feb 25, 2026 |
| 19 | ็่จๅฎๆบๅฑฑๆดพ ๆๅฐฑ้ข | Tengu | โ | Feb 18, 2026 |
| 20 | C**U*O Co., Ltd | Nightspire | โ | Feb 14, 2026 |
Frequently Asked Questions
How many ransomware attacks have occurred in Japan?
Japan has recorded 195 ransomware victim disclosures in this database, ranking #11 globally. This represents 1.2% of all tracked ransomware attacks worldwide.
Which ransomware groups target Japan?
The ransomware groups most active in Japan are Qilin, Clop, Ransomhub, Nightspire. These groups collectively account for the majority of victim disclosures attributed to Japan.
Which industries are most targeted by ransomware in Japan?
In Japan, the most frequently targeted sectors are Manufacturing, Technology, Business Services. These industries hold valuable data and often have critical operational requirements that make them attractive ransomware targets.
How does Japan rank globally for ransomware attacks?
Japan ranks #11 globally for ransomware attacks with 195 victim disclosures, representing 1.2% of the worldwide total of 16,710 tracked victims.
How can organisations in Japan protect against ransomware?
Organisations in Japan should implement a layered security approach including regular offline backups, network segmentation, multi-factor authentication, endpoint detection and response (EDR) tools, and employee security awareness training. Monitoring threat intelligence feeds for active groups targeting Japan is also recommended.