Japan, South Korea and the United States agreed on Friday to strengthen military ties to counter North Korea threat, local media reported, citing Defense Ministry. 
According to Yonhap news agency, the relevant agreement was reached by the senior officials of the three countries during discussions held earlier in the day. 
Deputy Director General for International Policy at the South Korean ministry Brig. Gen. Park Chul-kyun, US Acting Deputy Assistant Secretary of Defense for East Asia Andrew Winternitz, and Director for Defense Policy at Japan's Defense Ministry Koji Kano participated in the conference call. The sides condemned Pyongyang's recent missile launch, stressing that North Korean program posed a serious threat to the regional security. 

Source : QNA