Final answer:
Nichiren Daishonin was exiled and executed due to his religious beliefs and political influence, which challenged the authority of the ruling class in Japan.
Step-by-step explanation:
Nichiren Daishonin, a prominent Japanese Buddhist monk, was exiled and executed due to his religious beliefs and political influence. His teachings, which emphasized the recitation of the Lotus Sutra as the sole means of attaining enlightenment, challenged the authority of the ruling samurai class. As a result, Nichiren faced persecution and was exiled multiple times throughout his life. His final exile led to his execution in 1282. The government feared that his teachings could incite rebellion and undermine their power.