It was a long spear that had a blade with a length of 43.8 cm in the shape of a bamboo leaf and had an inscription on the shaft that read, "Made by FUJIWARA no Masazane," allegedly a Muramasa group member.
茎には村正の一派と言われる『藤原正真作』の銘があり、刃長43.8cmの笹穂型の大身槍である。