Complex sentence: He was a consistent "makuuchi" wrestler for many years after this, but began to decline after 1960 and he retired before the 1961 March tournament rather than face demotion to "jūryō".
Split into simpler sentences: He was a consistent "makuuchi" wrestler for many years after this, but began to decline after 1960. Tokisuyama retired before the 1961 March tournament rather than face demotion to "jūryō".