Slice The Cake - Kow Otani's Castle In The Sky
Kohei Tanaka and Kow Otani - JoJo Sono Chi no Sadame
Kow Otani - Liberated Guardian (Shadow of the colossus)
Kow Otani - Maikaze (TV size) / Aika Yoshioka
Otani Kow - Rengoku
Otani Kow - Tegami ~Haikei Juugo no Kimi he~
Slice the Cake - Kow Otani's Castle In the Sky