| Song | The Secret of Blue Water Vocal Collection II (TYCY-5188) 1992.01.29 | Ohtsuka Akio (大塚明夫) |
| Talk | Scramble Wars Yami no Labyrinth (TOCT-6502) 1992.07.08 | Ohtsuka Akio (大塚明夫) |
| Talk | Fire Emblem (MWCG-0007), 1994.01.25 | Ohtsuka Akio (大塚明夫) |
| Talk | Seiyuu Daisuki 3 (MRCA-20080) 1995.12.16 | Ohtsuka Akio (大塚明夫) |
| Talk | Toushinden -Before Stage- vol 2 (BVCH-632), 1996.04.24 | Ohtsuka Akio (大塚明夫) |
| Talk | Luna Silver Story Lunatic Festa vol 1 (KACN-1042), 1996.08.07 | Ohtsuka Akio (大塚明夫) |
| Talk | Luna Silver Story Lunatic Festa vol 2 (KACN-1043), 1996.09.04 | Ohtsuka Akio (大塚明夫) |
| Talk | King of Fighters '96 drama CD (PCCB-230), 1996.11.07 | Ohtsuka Akio (大塚明夫) |
| Song | Blue Seed Too (KICA-326) 1996.11.26 | Ohtsuka Akio (大塚明夫) |
| Talk | Psychic Force drama CD (PCCB-2339), 1997.01.08 | Ohtsuka Akio (大塚明夫) |
| Talk | Street Fighter EX drama CD (PCCB-256), 1997.03.21 | Ohtsuka Akio (大塚明夫) |
| Talk | Clock Tower 2 (PCCB-258), 1997.05.02 | Ohtsuka Akio (大塚明夫) |
| Talk | Hyper Police CD drama (COCC-14290), 1997.07.21 | Ohtsuka Akio (大塚明夫) |
| Talk | Detatoko Princess vol 1 (VPCG-84633), 1997.08.01 | Ohtsuka Akio (大塚明夫) |
| Talk | King of Fighters '97 Drama CD (PCCB-281), 1997.10.01 | Ohtsuka Akio (大塚明夫) |
| Talk | Aika vol 2 Sweet Emotion (COCC-14630), 1997.11.21 | Ohtsuka Akio (大塚明夫) |
| Talk | Choukousoku Gran Doll (AYCM-9001), 1997.11.21 | Ohtsuka Akio (大塚明夫) |
| Talk | Joker File 2 (KECH-1120), 1997.12.21 | Ohtsuka Akio (大塚明夫) |
| Talk | Yuukyuu Gensoukyoku 2nd Album drama CD vol 2 (PCCB-313), 1998.04.29 | Ohtsuka Akio (大塚明夫) |
| Talk | Chiffons Jikuu Daihyouryuu Charakasu Another (), 1999.04.05 | Ohtsuka Akio (大塚明夫) |
| Talk | Jane Oferinaito (MACA-2011), 1999.09.08 | Ohtsuka Akio (大塚明夫) |
| Talk | Nadesico Oshare Club (KICA-490), 2000.02.25 | Ohtsuka Akio (大塚明夫) |
| Talk | Cafe Kichijouji de 9 (), 2001.03.31 | Ohtsuka Akio (大塚明夫) |
| Talk | Piano 1 (MMCC-6001), 2001.06.27 | Ohtsuka Akio (大塚明夫) |
| Talk | Piano 2 (MMCC-6004), 2001.07.25 | Ohtsuka Akio (大塚明夫) |
| Talk | Cinematic Sound Drama GetBackers -Legend of Vampire- (MKC-0003), 2005.01.31 | Ohtsuka Akio (大塚明夫) |
| single Song | Kokoro no Sunday (CRDP-2008), 1992.12.16 | Ohtsuka Akio (大塚明夫) |
| single Talk | Yousei Yori Ai wo Komete 2 1995.04.29 | Ohtsuka Akio (大塚明夫) |
| single Talk | Yousei Yori Ai wo Komete 3 1995.04.29 | Ohtsuka Akio (大塚明夫) |
| single Talk | Yousei Yori Ai wo Komete 4 1995.04.29 | Ohtsuka Akio (大塚明夫) |
| single Talk | Yousei Yori Ai wo Komete 5 1995.04.29 | Ohtsuka Akio (大塚明夫) |