This signed katana bears the name “Sukesada” (祐定), a prominent swordsmith lineage from Bizen Osafune, active throughout the 14th to 16th centuries. The blade’s form—with a distinctly narrowing tip—reflects the practical fighting styles of the 15th century Muromachi period.
The blade is 52.7 cm long and is mounted in full WWII-era Imperial Japanese Navy officer koshirae, including a sharkskin-covered saya—a premium feature often seen in customized naval gunto.
This piece represents a rare fusion of classical battlefield design and 20th-century military history, ideal for collectors of both Japanese swords and WWII militaria.