This a small shin-shinto tanto by Mito Chikamitsu. He lived in Hitachi and was active around Keio (1865-1868). He was a student of Chikanori who had trained for a time under Takai Naotane. The blade is in need of polish. There is oxidation on the surface. The jigane is ko itame with ji-nie and chikei. The hamon is a wide ko-nie deki gunome with a togari boshi and long return. There are no kizu.
The koshirae consists of a black ishime saya and a tsuka with fine cotton string. The fittings are horn with a gold wash shitdome and shakudo male/female screw-together mekugi.
This tanto reflects tea ceremony taste and that was most likely its purpose. It is simple and quiet, yet also refined. A complete late Edo tanto ideal for restoration and shinsa.