According to the Official Keith Emerson Website:

Keith Emerson attended the Tokyo Philharmonic Orchestra‘s performance of “Tarkus” in Tokyo on March 20th, 2013 to celebrate the 60th birthday of a renowned composer,

Mr. Takashi Yoshimatsu, who arranged “Tarkus”. His arrangement was used on the weekly epic drama on national TV station, “Tairano Kiyomori” in Japan last year.

This will be the first time Keith hears this particular version of orchestral “Tarkus” performed live by a full orchestra.

The concert was held at Tokyo Opera City Concert Hall on March 20, 2013

Tarkus – Classic Meets Rock

This is a fantastic composition performed by the Tokyo Philharmonic Orchestra. Takashi Yoshimatsu has extended Tarkus creating a further masterpiece in the process.