Soka Gakkai and the Zen school are men of overbearing arrogance according to Nichiren Daishonin

"But the Zen school, revering the Buddha, which is the essential nature of phenomena, supposes that the self and [Shakyamuni] Buddha are equal, which is to fall into the error of overbearing arrogance.　Surely a person who does so will be condemned to the Avīchi hell. Hence the Lotus Sutra says, “The monks who are overbearingly arrogant will fall into a great pit.”