North Korea says Japan's PM Kishida wants to meet Kim Jong Un

North Korea's Kim Yo Jong, sister of the North Korean leader Kim Jong Un, said on Monday that Japanese Prime Minister Fumio Kishida had conveyed his intention to meet the North Korean leader, state media reported.

However, Kim Yo Jong said that improving relations between the two countries will depend on whether Japan, which occupied the Korean peninsula from 1910-45, can make practical political decisions.

"The prime minister should know that just because he wants to and has made a decision, it doesn't mean he can or the leadership of our country will meet him," Kim Yo Jong was quoted as saying in the KCNA report in Korean.

She was quoted as saying Kishida had made his intention known through "another channel", without giving details.

"What is clear is that when Japan antagonises the Democratic People's Republic of Korea and violates its sovereign rights, it is considered our enemy and will become part of the target,"Kim Yo Jong added.

The Democratic People's Republic of Korea is the North Korea's official name. Relations between the two countries have been strained over disputes dating back to Japan's occupation.

North Koreans accuse Japan of forcing women to work in wartime brothels for the Japanese military and using forced labour, among other issues.

Asked about the media reports on Kim's comment, Kishida reiterated the importance of a summit to resolve issues such as the matter of Japanese citizens kidnapped by Pyongyang's agents decades ago.

"Nothing has been decided for now," Kishida told reporters on Monday when asked about a summit.

North Korea admitted in 2002 to kidnapping 13 Japanese citizens decades earlier. Five abductees and their families later returned to Japan, saying the others had died.

However, Tokyo believes 17 Japanese were abducted, and continues to investigate the fate of those who didn't return, according to Japanese media.

Kishida has said he wants to hold talks with Kim Jong Un "without any preconditions" and is personally overseeing efforts to realise the first such summit in 20 years.

Kim's sister, who serves in the ruling Workers' Party, last month said Kishida may one day visit Pyongyang.

"If Japan ... makes a political decision to open a new path for improving ties based on mutual respect and respectful behaviour, it is my view that the two countries can open a new future," KCNA quoted Kim Yo Jong saying.