Disclosure by Japanese firms of breaches between 2015 and 2018
Date of report
  • February 2020
The Japanese defense contractors Pasco and Kobe Steel disclosed security breaches that happened between 2015 and 2016 and in May 2018. Kobe steel supplies submarine parts to the Japan Self-Defense Forces and Pasco provides satellite data. Nikkei suspects that Bronze Butler could have been involved.
Suspected victims
  • Japanese defense contractors
Suspected state sponsor
  • China
Type of incident
  • Espionage
Target category
  • Private sector