Japan and the United States started on Thursday their first comprehensive dialogue on issues relating to cyberspace, aiming to agree that cyberattacks pose threats to national security and to discuss countermeasures and international rule-making. The two-day meeting at the Foreign Ministry in Tokyo comes just days after the US Defense Department, in a report to Congress, blamed the Chinese military for mounting cyberattacks on computer systems owned by the US government, according to Japan’s (Kyodo) News Agency. The meeting will conclude with a joint statement. The two countries are expected to confirm their commitment to guarding against cyberthreats and holding similar meetings on a regular basis.