This is a famous Edo period hatamoto (high-ranking samurai) often seen in historical dramas like "Kinsan of Higashiyama" and "Hissatsu Shigotonin." He was known for his beautiful calligraphy, and his name was Tsutsui Ken. This work is indeed a genuine handwritten piece by him. I am offering this for sale to someone who appreciates it and will take good care of it. It is old, but has been relatively well-preserved. Please examine the seals and signature before considering a purchase. Thank you.