Tensions - and the strength of the rhetoric - between the two countries have flared over the past few months, with North Korea continuing to ramp up its nuclear and ballistic weapons programme despite worldwide condemnation.
The clashes came as South Korean president Moon Jae-in and Japanese prime minster Shinzo Abe met in Russia's Far East and repeated their calls for stronger punishment of North Korea over its nuclear ambitions, including denying the country oil supplies. North Korea conducted another nuclear test over the weekend.
Anchor: U.S. President Donald Trump has hinted that he would intensify economic and diplomatic pressure against North Korea rather than use a military option.
In a sideline meeting at the summit, Moon reportedly asked Putin to support new sanctions, the Times said.
However, the analyst cautioned, "Having nuclear weapons is not the only way or the best way for North Korea to guarantee its security".
Russian Federation and China have already prepared a "road map", which contains specific proposals to ease tensions in the region.
"Myself and President Putin share a view that North Korea has gone the wrong way with its nuclear and missile programme and that easing tension on the Korean peninsula is an urgent issue", Mr Moon said.
Faced with increasing pressure from the West, North Korea hit back at French leaders for suggesting that its nuclear ambitions posed a threat to Europe.
A USA official who briefed reporters later Thursday suggested that Trump is merely being careful and has not backed off the demand that North Korea give up its nuclear weapons.
And North Korea might have to go to war with all of it.
Russian President Vladimir Putin said at the meeting he thought the North Korea crisis would not escalate into nuclear war, predicting that common sense would prevail. North Korea has been aggressively testing its missiles since 2012.
"The battery will be operational as soon as the US finishes its internal procedures", South Korean defence ministry spokesman Moon Sang-gyun told reporters. "Hopefully, we're not going to have to use it on North Korea".
Kang says the regime picks public holidays for weapons tests to boast to the world, but also to serve as propaganda to bond North Koreans.
"I could imagine such a format being used to end the North Korea conflict".