A wakizashi signed 肥前住貞光 “Hizen-jū Sadamitsu,” with the reverse side inscribed 一命 “Ichimei” (literally “one life”).
Blade length: 38.5 cm; curvature: 0.9 cm.
The smith Sadamitsu is considered a Hizen province craftsman, and this blade is attributed to the early Edo period. Hizen works are known for their refined steel and controlled tempering, influenced by the traditions of Bizen. This example shows a mokume-hada with a soft, well-forged texture, and a suguha. The boshi is neatly formed in a small, rounded style.
The tang is well preserved, with clear file marks and stable patina. Traces of gold-colored residue within the file marks are consistent with long-term aging and contact.
The reverse inscription “Ichimei” (一命) literally translates to “one life” or “a single life,” and is commonly interpreted as a dedicatory or symbolic phrase, expressing resolve, loyalty, or a willingness to devote one’s life—an inscription sometimes seen on blades carried during wartime.
The sword is mounted in a rare short-pattern Type 98 guntō koshirae associated with Army aviators, designed for practical carry in confined spaces such as aircraft cockpits. Such mounts are far less common than standard-length guntō.