Republic of Korea
Did not participate in TPNW negotiations
Has not yet joined TPNW
South Korea has not yet signed or ratified the Treaty on the Prohibition of Nuclear Weapons. It did not participate in the negotiation of the treaty at the United Nations in New York in 2017 and thus did not vote on its adoption.
In June 2017, a week before the adoption of the treaty, the US president, Donald Trump, and South Korean president, Moon Jae-in, issued a joint statement in which the United States reiterated its “commitment to provide extended deterrence to [South Korea], drawing on the full range of US military capabilities, both conventional and nuclear”.
South Korea voted against a UN General Assembly resolution in 2019 that welcomed the adoption of the treaty and called upon “all states that have not yet done so to sign, ratify, accept, approve, or accede to the treaty at the earliest possible date”.
On the opening day of the TPNW negotiating conference in 2017, South Korea joined the United States and several other states in protesting the treaty-making process.
Ban Ki-moon, a former foreign minister of South Korea and a former UN secretary-general, was among 56 former leaders and ministers in US-allied states who signed an open letter in September 2020 calling on current leaders to “show courage and boldness – and join the treaty”.
In 2016, South Korea voted against the UN General Assembly resolution that established the formal mandate for states to commence the negotiations in 2017 on “a legally binding instrument to prohibit nuclear weapons, leading towards their total elimination”.
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