Japan's Prime Minister Kishida Fumio has called for support from the international community to put to an end to nuclear testing.

Kishida, who is visiting New York for the UN General Assembly, attended a leader-level meeting on Wednesday aimed at allowing the Comprehensive Nuclear-Test-Ban Treaty to enter into force.

The treaty pursues a total ban on any nuclear weapon test explosions and any other nuclear explosions.

It is ratified by 174 nations, including Japan, but it has yet to take effect, as nuclear-armed countries such as the United States and China have not ratified it.

Kishida said Russia's invasion of Ukraine has made the halting journey to a world free from nuclear weapons even more strenuous. But he added no matter how uphill that journey is, there is a need to keep going.

He outlined the necessity to make specific efforts to realize an early entry into force of the treaty and achieve universal adherence to it.

Kishida stressed the importance of strengthening the treaty's verification process and continuing to urge non-signatory nations to join the pact.

He also expressed readiness to keep providing support to enhance management of the treaty in the Asia-Pacific region.

Kishida called on his counterparts to join tenacious efforts to promote realistic and practical approaches to realizing a world without nuclear weapons through discussions at the G7 summit to be held next year in Hiroshima.