A very nice tsuba by Bushu Ito Masakata. He was the 3rd generation main line head of the Bushu
Ito school. The design of this tsuba is quite impressive and the mei is important.
He was the son of Bushu Ito Masatsune. Masakata passed away in 1774. He is recorded in
many books and this is a fun tsuba to study. Signed early Bushu works are hard
to find on the market. The four ring theme is very martial. It comes from
fighting technique of being aware / skilled at fighting / defending 4 quadrants
at once.