Markings on the tang interpreted to read
Swordsmith: Tsugu Mitsu.
12th year Tenmon Era (1543)
City of Osa Fune
Bi Zen Province
The blade measures approximately 27 inches long, the overall length including the hilt is approximately 37.5 inches long.
The tsuba and the menuki date from the early 1600's
The hilts of Japanese swords were customarily re-wrapped every 50 to 100 years. The wooden scabbards were also replaced every 50 to 100 years as well.
The Tenmon era in Japan dated from 1532 to 1555