For Pyongyang, meanwhile, the news of Trump's military action against Syria probably spoke louder than words.
An expert who has authored a book on North Korea said Saturday not to be surprised if North Korean leader Kim John Un went into hiding following the USA missile strike against Syria, stating in an email to Fox News that American military power was more than likely something he had "dismissed before". "The number one threat in the region continues to be North Korea, due to its reckless, irresponsible, and destabilizing program of missile tests and pursuit of a nuclear weapons capability".
Abe on Friday voiced support for air strikes Trump ordered against Syria after Damascus deployed deadly chemical weapons on a rebel-held area earlier in the week.
Heading into the first talks between President Donald Trump and his Chinese counterpart, Xi Jinping, North Korea was the front-and-center security issue on the table.
Secretary of State Rex Tillerson says the us missile strikes against a Syrian air base in retaliation for a chemical weapon attack carries a message for any nation operating outside of global norms.
"The US missile attack against Syria is a clear and intolerable act of aggression against a sovereign state and we strongly condemn it", KCNA news agency quoted an unnamed spokesman for the North Korean foreign ministry as saying.
The U.S. airstrikes this week were aimed at a Syrian air base, but nearly certainly got the attention of another adversary - North Korea.
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Kim, the dictator, has been hinting that an intercontinental ballistic missile test or something similar could be coming, possibly as soon as April 15, the 105th birthday of North Korea's founding president and celebrated annually as 'the Day of the Sun'.
In response, Secretary of State Rex Tillerson only offered a 23-word statement: "North Korea launched yet another intermediate range ballistic missile".
You may recall the recent response to the USA and South Korea conducting drills with the USS Carl Vinson, a Navy supercarrier with nuclear capability, being involved.
Others pointed out that the fact that North Korea already has nuclear capabilities and the potential threat to US allies South Korea and Japan make it unlikely that Washington would risk military action. Underscoring that point, Washington has recently deployed numerous strategic assets to the peninsula as part of annual joint war games with the South.
Trump has recently threatened unilateral action against Pyongyang if Beijing fails to help curb its neighbor's nuclear weapons program.
"There is a difference between Syria and North Korea", Yamamoto said.
Among the options being considered, according to officials, is for the USA to start positioning a number of nuclear weapons in South Korea.