North Korea said Monday that Japanese Prime Minister Fumio Kishida has proposed a summit with North Korean leader Kim Jong Un, as the North urged Japan to show sincerity toward improving bilateral ties and realizing their countries’ first summit in about 20 years.

Japan’s government did not immediately respond to the North Korean announcement. In the statement carried by state media, Kim’s sister and senior official, Kim Yo Jong, said Kishida used an unspecified channel to convey his position that he wants to meet Kim Jong Un in person at an early date.

Kim Yo Jong said there will be no breakthrough in North Korea-Japan relations as long as Kishida’s government raises the issue of Japanese citizens abducted to North Korea in past decades and opposes what she described as the North’s “exercise of sovereign rights,” apparently referring to the North’s weapons testing activities.