This is a traditional Japanese Vajra (Kongōsho), a sacred ritual implement used in Esoteric Buddhism. Crafted from solid copper, the piece carries a substantial weight and a warm aged patina developed over time. The vajra is a symbolic ritual object representing indestructibility, spiritual power, and the union of wisdom and compassion. In Japanese Buddhist practice—particularly within Shingon and Tendai traditions—it is used in ceremonial rites and temple rituals. The form is finely balanced, with symmetrical prongs and a central grip section, reflecting traditional craftsmanship and religious symbolism. The surface shows natural oxidation and age-related wear consistent with vintage condition, enhancing its authenticity and historical character.