This is a very large and strong mumei (unsigned) katana attributed to the Mutsu smith known as Aizu Kanetomo. Kanetomo worked around the Kaei era or 1848 in Northern Honshu in the province of Mutsu. He was the sixth generation smith from this area using this name. He was also the most skilled. This is a large sword measuring 30 13/16 inches or 78.2 cm in cutting edge. The moto-haba is 1.25 inches or 3.2 cm and the saki-haba is 0.85 inches or 2.2 cm. It has a very slight sori. The hada is ko-itame and the hamon is gunome notare. The bôshi is ko-maru with a short kaeri. This blade is unsigned and comes with NTHK papers attesting to the attribution. These papers were issued in 1993 by Yoshikawa Koen sensei who has since passed away. The blade is in pretty good polish but could use a slight clean-up in areas of old finger prints and rubbing. This is reflected in the extremely reasonable price as shown below.
Accompanying this blade is a fine set of mounts showing a Satsuma influence. The tsuka is particularly long and the fuchi and kashira have an oval feeling such as we find on Satsuma mounts. The shakudo fuchi and kashira have NTHK papers attributing them to the Mito school. The iron tsuba is also outstanding and comes with NTHK papers attributing it to a tsuba maker of the Aizu Shoami school. The menuki are large and are made of silver and gold and they depict cranes in flight. All of the metal fittings are en-suite and make a nice koshirae. The saya looks to have been re-lacquered at some point in its history. The quality of the mountings alone very nearly justify the price of this sword.
Please note that this blade comes in its koshirae, there is no shirasaya.