There may also be resistance from Japan's three armed services (Army, Navy and Air Force) to form a joint signals intelligence (SigInt) and information security (InfoSec) organisation. Such an organisation would be typically staffed by uniformed and civilian personnel.
Submarine Matters suggests if Japan wants to successfully market large, highly sensitive weapon systems it needs to fix these problems.
…Similarly in Japan, the cabinet's National Center of Incident Readiness and Strategy for Cybersecurity (NISC) and the relevant ministries and agencies are in charge of the cybersecurity of critical infrastructure, while the Cyber Defense Unit --whose mission is to monitor the networks of the Ministry of Defense and the JSDF, and to respond to incidents occurring in them--does not defend the systems and networks used in critical infrastructure or in the defense industry.
Cybersecurity Center Level