The cosmos was once held in a delicate, luminous balance, overseen by the brilliant sun goddess Amaterasu-Omikami, who radiated warmth and vitality from her heavenly domain. However, this celestial harmony was abruptly shattered by the erratic and destructive behavior of her brother, Susanoo-no-Mikoto, the god of storms and the seas. Susanoo, prone to wild outbursts of jealousy and malice, committed a series of severe transgressions that violated the sacred order of the heavens. He destroyed his sister's carefully cultivated rice paddies, defiled her sacred ceremonial halls, and, in a final act of horrifying disrespect, threw a flayed heavenly piebald horse through the roof of her weaving hall, causing one of her beloved weaving maidens to die of fright.
Overwhelmed by profound grief, terror, and shame at her brother's unspeakable actions, Amaterasu chose to withdraw entirely from the world she sustained. She fled to the celestial heights and sealed herself inside the Ama-no-Iwato, the Heavenly Rock Cave, blocking the entrance with a massive, immovable stone boulder. The consequence of her retreat was instantaneous and devastating. The High Plains of Heaven, Takamagahara, and the Middle Land of Reed Plains below were immediately plunged into pitch-black darkness. Without the sun's guiding light, the natural order crumbled. The crops began to wither, cold winds swept across the barren landscapes, and countless malevolent spirits and evil deities emerged from the shadows, their discordant clamor echoing like the buzzing of swarms of flies throughout the darkened cosmos.
Realizing that the world would perish if the light of the sun did not return, the eight million deities (Yaoyorozu-no-Kami) rose up in deep concern. They realized that force alone would not succeed in moving the stubborn rock door, nor could they compel the supreme goddess of light to emerge against her will. To find a solution, they traveled to the quiet, wide gravelly riverbed of Ama-no-Yassugawara, the Heavenly River of Eight Quiet Currents. This vast, stony basin, where the water flowed gently under the dark, starless sky, served as a neutral and sacred meeting ground. Here, the gods congregated in their multitudes, their divine essences casting small, flickering glows against the cold river stones as they debated how to restore light to the heavens.
At the center of this immense assembly stood Omoikane-no-Kami, the god of wisdom, deep thought, and collective deliberation. Knowing that hasty action would yield nothing, Omoikane stood quietly on the rocky bank of the river, listening to the rushing of the water and the worried murmurs of the gathered assembly. He knew that to lure Amaterasu out, they could not rely on anger or pleading. Instead, they needed to appeal to her natural curiosity and her sense of duty, creating a spectacle so extraordinary and joyful that she would feel compelled to peek outside to see what could possibly bring such happiness in a world of absolute dark.
With meticulous care, Omoikane began to organize the collective talents of the deities. First, he commanded the long-singing birds of the eternal land, the ancestral roosters, to be brought to the riverbed. Their collective, loud crowing would herald the mock arrival of a false dawn, creating a sense of anticipation and natural rhythm. Next, he directed the blacksmith god Amatsumara and the goddess of metalworking Ishikori-dome-no-Mikoto to forge a magnificent, polished bronze mirror, the Yata-no-Kagami, which would reflect Amaterasu's own dazzling beauty back at her. He also instructed the deity Futodama to pull up sacred Sakaki trees from the heavenly Mount Kagu, decorating their branches with exquisite strings of curved Yasakani beads, along with white and blue paper offerings.
To ensure the plan's success, Omoikane called upon Ame-no-Uzume-no-Mikoto, the goddess of mirth, dance, and revelry. While the other gods prepared the physical objects and arranged themselves in a grand semi-circle around the entrance of the cave, Uzume devised a wild, joyous performance. She overturned a hollow wooden tub near the cave's stone door to act as a resonant drum, bound her sleeves with vines of heavenly ivy, crowned her head with wild moss, and held a bundle of bamboo grass in her hands. The god Ame-no-Tajikarawo, renowned for his unmatched physical strength, concealed himself quietly right beside the stone door of the cave, waiting for the precise moment when he might use his power to pull the boulder aside.