"Former UN Sanctions Commissioner on North Korea 'Captures Preliminary Preparations for North Korea's Nuclear Test at Punggye-ri Nuclear Test Site' " by Cho Sang-jin for VOA Korea

ONN Senior Analyst Katsuhisa Furukawa's publication cited by VOA Korea.

VOA Korea reported about Katsuhisa Furukawa's publication "Developments at the DPRK's Punggye-ri Nuclear Test Site since December 2021".

Furukawa said in a report on the analysis of the Punggye-ri nuclear test site published by the Open Nuclear Network (ONN), a private research organization headquartered in Vienna, Austria, that there was active movement at the Punggye-ri nuclear test site, which North Korea claimed to be decommissioned in 2018.