The Preparatory Commission for the Comprehensive Nuclear Test Ban Treaty Organization plans to convene a ministerial-level meeting as soon as April amid heightened concern over nuclear weapons proliferation following North Korea's nuclear test last week, commission Chairman Cristian Istrate said.

At the meeting to commemorate 20 years since the opening of the treaty to signing, participants are expected to call for it to be brought into force, and to discuss the commission's efforts to monitor nuclear tests across the globe.

In a recent interview with Kyodo News, the Romanian ambassador said he hopes Foreign Minister Fumio Kishida, a Diet member representing the city of Hiroshima, which was devastated by a U.S. atomic bomb in 1945, will attend the meeting.