North Korean leader Kim Jong-un can be held accountable for "massive" human rights atrocities, committed by the state, after a United Nations investigator confirmed that the organisation has enough evidence to hold the dictator responsible.

UN investigator Marzuki Darusman said Kim could face international justice after officials gathered enough evidence, showing that the secretive state's leader ordered killings and systematic torture and starvation of his people, which is reminiscent of Nazi era against the Jews and minority groups.

The European Union and Japan has called for North Korea to be held accountable for crimes against humanity. However, the UN resolution, which was drafted by the two parties, did not name Kim.

In February, the UN published a report that suggested North Korean security chiefs and possibly Kim should face the organisation's general assembly committee, a 15-member security council, and international criminal court (ICC).