Yukio Yokoyama /
Chopin /
Etude No. 4 in C-Sharp Minor, Op. 10, No. 4
October 7 - 9, 1992 in Tokyo - Bunka Kaikan - Mai Mai Hall
- ( 1 CD ) Sony SK 62605
- ( 1 CD ) Sony Japan SICC-10021
- ( 1 CD ) Sony Japan SRCR-2685
October 17 - 18, 2010 in Ueno Gakuen - Ishibashi Memorial Hall
- ( 1 CD ) King Records KICC-913
- (12 CD) King Records KICC-91440