“Two members of the Tokyo String Quartet , including its founding violist, will retire from the group at the end of next season, in June 2013 … The violist, Kazuhide Isomura, 65, helped start the quartet in 1969. Also leaving is the second violinist, Kikuei Ikeda, 64, who joined in 1974.” The remaining members are violinist Martin Beaver and cellist Clive Goldsmith.