The Kennedy Center’s KC Jazz Club hosted a true pioneer Saturday night in 2007 NEA Jazz Master Toshiko Akiyoshi. The 80-year old pianist was first exposed to jazz in her native Japan, first playing the music for American soldiers in the years following World War II. She came to the U.S. in 1956 to study at the Berklee School (now College) of Music, after which she made the rounds playing clubs in New York….