After Tsukuyomi killed , the ShintÅ deity for food, Amaterasu refused to ever look upon him again, moving to another part of the sky and beginning the cycle of day and night.
He also displayed maturity beyond his age as he noticed her mother's illness and helped her all the way till her death.
Shortly before his death of at least 85 years in age, he battled his older twin brother, who turned into a demon.