The character known as "Black Daimaou" (Great Black Demon King) serves as the central antagonist in *Soreike! Anpanman: Tenohira o Taiyō ni* (1998). An ancient malevolence imprisoned within a jar in the Valley of Darkness, he was sealed away centuries earlier by Prince Shine, who forfeited his life to contain the entity’s cataclysmic power. His dormant threat resurfaces when Baikinman and accomplices unearth the jar, seeking to weaponize his chaos.

Upon release, Black Daimaou blankets the world in consuming shadow, his mere existence destabilizing reality. The Denden troupe and SL-Man confront this primordial force within the Valley of Darkness, battling to halt his mindless rampage. Devoid of personal ambition or motive, he embodies pure annihilation, a relic of chaos unrestrained by reason or mercy.

The conflict culminates in Anpanman’s decisive intervention, countering the entity’s darkness to reclaim equilibrium. His origins, personality, and history remain unexplored, with no expanded lore or subsequent appearances documented in the cited sources.