Nichiren and the Great Mongol Invasion(日蓮と蒙古大襲来)

During the 1200's, legendary Buddhist monk Nichiren returns from his studies to lead Japan out of moral crisis and prepare to fight Mongol invaders by creating a new form of Buddhism. He runs afoul of the existing Buddhist sects and their government supporters and is persecuted. Can Nichiren persevere before the Mogol fleet reaches Japanese shores?