The Tsuba, crafted with a rather on thinner yet large shape, features a jet-black iron color with a hammered texture, and is adorned with plum blossom crests "Umebachi"-mon" in an openwork across its surface. The feature of slightly thinning from the central base Seppa-dai  to the outer rim and creating transparent reliefs of family crests is believed to have been developed by armorers "Kacchu-shi" from Muromachi period. Most of these works are unsigned, and they reached their peak popularity during the Sengoku period, favored by Samurai and feudal lords.

This tsuba is considered to have been made in the late Muromachi period, as evidenced by the presence of two Hitsu-ana openings for utility tools). The Seppa-dai is inscribed with the ancient two-character signature "Nagashisa".

According to the "Katchūshi Meikan" (Directory of Armorer Signatures), "Nagahisa" refers to Fujiwara Nagahisa, an armorer who signed his works as "Kishū Uji-jū Nagashisa"

Late Muromachi Period

Reference: Sasama Yoshihiko, "Katchūshi Meikan" Tōken Shunjū Shinbunsha, 1975.