North Korea vowed on Tuesday to take decisive military measures in response to Japan's recently announced military strategy, while leader Kim Jong Un's sister made remarks about Pyongyang's missile program.

North Korea has stressed that the new Japanese security strategy is "a violation of United Nations charters and a serious challenge to international peace."

Pyongyang said it had the right to "take decisive military measures to protect our rights, and we will demonstrate with actions the seriousness of Japan's latest choices."

On Friday, Japan revealed a defense policy unprecedented since World War II, including the allocation of 320 billion dollars to strengthen its military capabilities.

The new defense policy includes the right of Japanese forces to launch "counter strikes" against countries it considers hostile.

Sanctions will not stop us.

In a related context, North Korea stressed today that the additional sanctions will not stop its missile program.

This came in statements made by Kim Yo Jong, the sister of North Korean leader Kim Jong Un.

The comments come days after Pyongyang launched two medium-range ballistic missiles in what it described as an "important" test for the development of a spy satellite.

Kim Yo Jong said that this development is directly related to the country's security.