Photo provided by Korean Central News Agency (KCNA) on Feb. 13, 2017 shows top leader of the Democratic People's Republic of Korea (DPRK) Kim Jong Un (1st L) guiding a test firing of a surface-to-surface medium- and long-range ballistic missile Pukguksong-2 on Feb. 12, 2017. The DPRK on Monday claimed it successfully test-fired a surface-to-surface medium- and long-range ballistic missile Pukguksong-2 and its top leader Kim Jong Un guided the test firing, according to the state news agency KCNA. (Xinhua/KCNA)

PYONGYANG, March 7 (Xinhua) -- Kim Jong Un, the supreme leader of the Democratic People's Republic of Korea (DPRK), has supervised a ballistic rocket launching drill of the Korean People's Army (KPA), said the Korean Central News Agency (KCNA) Tuesday.

Involved in the drill were Hwasong artillery units of the KPA Strategic Forces "tasked to strike the bases of the U.S. imperialist aggressor forces in Japan in contingency," said the report.

Kim learned in detail about the preparations for fire strike" while going round the ballistic rocket launching ground," said the report.

"He appreciated that Hwasong artillery units of the Strategic Force are very good at organizing and commanding fire strikes and strictly ensuring rapid and simultaneous fire strikes," said the report, adding that four rockets were launched simultaneously.

According to earlier media reports, the rocket launching drills were conducted on Monday on the eastern coast of DPRK.