When Minamoto no Yoriyoshi prayed at Usa Hachimangu before the Former Nine Years’ War (1051–1062), the historic alliance between Japan’s samurai class and the god Hachiman began. For nearly a thousand years, every major warrior government — the Minamoto, the Kamakura Shogunate, the Ashikaga, the Sengoku warlords, and the Tokugawa — claimed Hachiman Daibosatsu (Great Bodhisattva Hachiman) as their tutelary deity.
Hachiman’s divine identity is based on Emperor Ojin, a semi-legendary 4th-century emperor celebrated for military prowess and the introduction of continental culture. During the era of Shinto-Buddhist fusion, he was worshipped as “Hachiman Daibosatsu” — a bodhisattva of war — combining both traditions in a uniquely Japanese synthesis.