This is a cabinet card photograph of a Samurai warrior in full armor with swords and helmet c. mid 1800s. The photo shows the Samurai with his Katana (long sword) tucked into his sash. He has his Wakizashi (short sword) in his left hand and is holding his helmet in his right.
The kanji script on the back of the photo says "To Mr. Kurosawa". The writing on the bottom says ”Matter of Fact Photograph”.