Koyasu Jizo is a form of Jizo Bosatsu (Kshitigarbha) venerated in Japanese folk Buddhism as a protector associated with safe childbirth and the wellbeing of children. Statues depicting this figure, often shown holding an infant or surrounded by children, are commonly found at temples and roadside shrines where expectant mothers and families traditionally offer prayers. As with other regional Jizo forms, devotional practices and beliefs surrounding Koyasu Jizo vary by locality and have developed through folk tradition rather than a single doctrinal source.