石山本願寺
During the Sengoku period, fearing the power of the monks of the Hongan-ji, Oda Nobunaga tried to destroy it. For ten years, he laid siege to the Ishiyama Hongan-ji in Osaka, one of the two primary temple fortresses of the sect. In 1580, the abbot of the Ishiyama Hongan-ji, Kennyo, surrendered, while his son Kyōnyo refused to surrender, for which he was publicly disowned.