The presidential office Cheong Wa Dae characterized it as a face-to-face conversation, neither a formal summit nor a "pull aside." But Moon and Abe agreed to resolve pending issues via dialogue during a meeting held in a "very friendly and serious" mood, Cheong Wa Dae spokesperson Ko Min-jung said.

Moon also delivered a condolence message over the death of firefighters who were aboard a rescue chopper that crashed into the East Sea last week.

"I would like to extend my message of consolation to the families of those who were found dead and went missing. I will promise to do my best to find the crew and those aboard the chopper," Moon added.

The rescue helicopter, carrying seven people, including an injured person, crashed into the East Sea on Thursday night shortly after taking off from the easternmost islets of Dokdo. Three bodies believed to be victims have been found. (Yonhap)