Japan ’s Defense Ministry and Self - Defense Forces ( SDF ) were targeted in a sophisticated cyberattack in September , presumably carried out by a masked actor . Having penetrated the Ground Self - Defense Force tactical computer system , likely to steal information from its high - speed communication network connecting SDF bases and camps , further details of the theft are unclear . A senior military spokesman has called the theft a “ very serious crime ” .
Japan’s Defense Ministry and Self-Defense Forces (SDF) were targeted in a sophisticated cyberattack in September, presumably carried out by a state actor. Having penetrated the Ground Self-Defense Force’s computer system, likely to steal information from its high-capacity communication network connecting SDF bases and camps, further details of the theft are unclear. A senior SDF official has called the case a “very serious situation”.