Nagasaki Mayor Tomihisa Taue will attend the first meeting of parties to a U.N. treaty banning nuclear weapons in Vienna next month to rally the global community against the use of such armaments, the municipal government said Monday.

"We need to raise international public opinion on halting the use of nuclear weapons" amid drastic changes to the security situation following Russia's invasion of Ukraine, Taue said during a meeting with city assembly members.

His remarks came ahead of his participation in the three-day meeting of the signatory states to the Treaty on the Prohibition of Nuclear Weapons from June 21. He will be joined by Hiroshima Mayor Kazumi Matsui, who has expressed his intent to take part.