Demanding the immediate resignation of controversial NHK Chairman Katsuto Momii, a group of citizens launched a campaign Thursday calling for viewers to stop paying the NHK subscription fee.

The group, called NHK wo Kanshi Gekirei Suru Shichosha Community (roughly, a Viewers' Community to Monitor and Encourage NHK), said in a statement that it kicked off the six-month campaign because Momii, whose contentious remarks on wartime history angered the public and Japan's neighbors since he assumed the top post in January, refuses to step down. It was not immediately clear where the group was based or how big it is.

The group warned NHK that if Momii does not resign by the end of April, its members would freeze their payments for six months.