Onosaka Masaya has said that originally wanted to become an actor, joining what he thought was a training academy for actors. He later realized it was actually an academy for voice actors. ( Interview Source )
Since his 1986 debut Onosaka has contributed to over 150 anime and OVAs, 150 video games, 35 drama CDs and more, such as:
・BLEACH (with VAs for Fellow, Grim, Leona, Riddle)
・BLEACH: Birth of Souls (with VAs for Trein, Grim, Baul)
・Bobobo-bo Bo-bobo (with VAs for Baul, Swing)
・Bungo to Alchemist (with VAs for Rollo, Floyd, Riddle, Grim, Lilia, Fellow, Baul, Trey, Silver, Deuce, Jade, Ortho)
・Cardcaptor Sakura (with the Chief Engineer’s VA)
・ONE PIECE (with VAs for Floyd, Skully, Baul, Rollo, Trein, Fellow, Grim, Vargas, Swing)
・Petshop of Horrors (with Crowley’s VA)
・Persona 3 (with VAs for Lilia, Leona)
・Pretty Guardian Sailor Moon (with VAs for Lilia, Maleanor)
・Prince of Tennis
・Train to the End of the World (with VA for Skully)
・Trigun (with Rollo’s VA)
Twisted Wonderland Reference Note 