"Naze Ikiru: Rennyo Shōnin to Yoshizaki Enjō" is a historical anime series that centers on the life and teachings of Rennyo Shōnin, a pivotal figure in Japanese Buddhism during the late 15th century. The narrative unfolds during the tumultuous Sengoku period, a time of social upheaval and political instability in Japan. Rennyo, the eighth head priest of the Hongan-ji Temple, emerges as a charismatic leader who seeks to spread the teachings of Jōdo Shinshū Buddhism, a sect founded by his ancestor Shinran. The story highlights his efforts to unite people across class divides, offering spiritual solace and guidance amidst the chaos of war and societal fragmentation.

The plot begins with Rennyo's early struggles as he inherits the leadership of Hongan-ji Temple, facing opposition from rival religious factions and political powers. His journey takes him to Yoshizaki, a remote area where he establishes a new base to propagate his teachings. The series delves into his interactions with local villagers, samurai, and other religious leaders, showcasing his ability to inspire faith and foster a sense of community. Key events include the construction of the Yoshizaki Gobo, a temple that becomes a symbol of hope and resilience, and the challenges posed by external threats, such as military conflicts and internal dissent.

The main characters include Rennyo Shōnin, portrayed as a compassionate yet determined leader whose unwavering faith drives his mission. Supporting characters include his disciples, who play crucial roles in spreading his teachings, and local villagers whose lives are transformed by his presence. Antagonists, such as rival religious leaders and warlords, provide conflict and tension, highlighting the broader societal struggles of the era. The series emphasizes themes of perseverance, faith, and the power of unity, offering a nuanced portrayal of Rennyo's legacy and his impact on Japanese Buddhism.