Essential jazz album among the influences of the future-jazz quartet Sleep Walker by trombonist Hiroshi Suzuki. "Variation" is a joint project including the legendary jazz drummer Masahiko Togashi featurig pianist Yuji Ohno, saxophonist Jun Suzuki and trumpeter Tetsuo Fushimi. Masahiko Togashi was a major figure alongside Masahiko Sato, Masayuki Takayanagi and Yosuke Yamashita in the blooming of free jazz in Japan in the late sixties whose "Variation" is one of the iconic masterpiece.