Unsigned tantō measuring 26.6 cm in blade length, with 0.2 cm of sori. The blade features a refined ko-itame jihada and a restrained suguha hamon, with a hi carved along the blade. 
The blade is mounted in an attractive late-Edo style koshirae. The tsuka is covered entirely in white samegawa and left without an ito wrap. It is fitted with blackened metal fittings and a finely decorated menuki. The accompanying saya is of distinctive inrō-zukuri form, fully covered in black sharkskin.
According to an appraisal made in Shōwa 49 (1974) by Shibata Sword in Tōkyū Department Store, the unsigned blade was attributed to the 8th-generation Hizen Tadayoshi (肥前国八代忠吉) and dated to the late Bakumatsu period.The blade is attributed to the 8th-generation Tadayoshi of the Hizen tradition (1801–1859), a prominent swordsmith of the late Edo period. As the successor to the long-established Tadayoshi lineage of Saga, he continued the refined Hizen tradition characterized by finely forged ko-itame jihada and clear, elegant suguha-based hamon. In addition to his work as a swordsmith, the 8th Tadayoshi was appointed by the Saga domain in 1850 to participate in the manufacture of Western-style artillery, reflecting the changing technological and political environment of the Bakumatsu period.