on May 17.
In May, the leaders of the two feuding groups met for the first time in 60 years and signed a joint statement pledging to reconcile and form closer ties.
Mindan, however, scrapped the joint statement soon after North Korea test-fired seven missiles intothe Sea of Japan on July 5.
Many Mindan members have accused the leadership of single-handedly pushing for reconciliation at a time when Japanese sentiment is strongly against North Korea because of unresolved questions over Pyongyang's abductions of Japanese nationals.
Some of Mindan's umbrella organizations have started a petition drive calling for its highest decision-making body to hold a special session to pass a no-confidence motion against the leadership.
Three of Mindan's five vice presidents resigned July 3.
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