Bizen Kuni Ju Osafune Sukesada
Dated Tenmon 16th year, 2nd month (February) 1547
The sword was made in the very beginning of the Senkoku Wars, from it's length and shape, quality of workmanship, signature date and very nice fitting, I would guess this is to be a specially made to order blade for the student and collector.
An invaluable source of information to research and confirm the shape of swords of the Muromachi period in or about the year 1547. The Hamon reminds me of a work by the foremost Sukesada Yosozaemon No Ju Sukesada.
This blade has experienced much action and bares the scars. There are at least three what the Japanese Samurai calls honour wounds. They are strike marks visible on the Mune and the Kissake. This is a most valuable research sword for the collector and student of the sword.