In a dramatic naval battle in the Shimonoseki Strait, the Minamoto clan led by Minamoto no Yoshitsune completely annihilated the Taira fleet, bringing a bloody end to the Genpei War. The young child Emperor Antoku drowned during the chaos alongside the Taira elites, symbolizing the total destruction of the old regime. This monumental event concluded the classical Heian period and established the Kamakura Shogunate, shifting power permanently away from the imperial court to a military dictatorship.

The tragic annihilation at Dan-no-ura became the supreme cultural narrative of classical Japanese literature, directly inspiring the epic Buddhist masterpiece 'The Tale of the Heike' (Heike Monogatari). Recited by blind lute priests (biwa hōshi) as a powerful musical and spiritual ritual, the epic popularized the Buddhist concept of impermanence (shogyō mujō). It established a permanent literary aesthetic where worldly glory is seen as fleeting as a dream on a spring night.