Yamadera Kouichi DVDs/Blurays/videos
Some of the video media (Bluray, DVD, laser disc, VHS tape) that Kouichi has appeared in are as follows.
| 1990.09.25 | Tokyo City Melhen 2 (VVT-520) | Act |
| 1992.03.25 | Konya ha Zettai Carnival Ashita ha Free Kick (TYVY-3004 TYLY-3004) | Song |
| 1992.06.21 | Wataru 3 Memorial Live (VIVY-39) | Song, Talk |
| 1992.10.21 | Banana Fritters Live 92 (MEVH-48001 MELH-48001) | Song, Talk |
| 1992.??.?? | Talking Head (BELL-560) | Movie |
| 1994.07.25 | Yuugen Kaisha case file 00 (Pioneer PIVA-1027 and USA POP program) | Skit, Talk |
| 1994.??.?? | Voice Actor 30 I (KMPL-101) | Talk |
| 1995.06.?? | Bandai Entertainment Magazine 4 (Animate store promotion video) | Talk |
| 1995.08.19 | Ranma 1/2 DoCo music video (PCLE-00020) | Talk |
| 1995.08.21 | Voice Actor 30 Series Super 2 (TKPV-202 TKPL-202) | Talk |
| 1995.??.?? | Fam and Ihrlie turn 1 (BEAL-787) | Interview |
| 1996.03.23 | "Voice Actor Power Special" Studio Lips vol 3 (BVLA-10 BVVA-10) | Song |
| 1996.03.23 | Say You Club TV vol 1 (BVVA-11 BVLA-11) | Talk |
| 1996.03.23 | Say You Club TV vol 2 (BVVA-12 BVLA-12) | Talk |
| 1996.04.24 | Say You Club TV vol 3 (BVAA-13 BVLA-13) | Talk |
| 1996.04.24 | Say You Club TV vol 4 (BVAA-14 BVLA-14) | Talk |
| 1996.05.22 | Say You Club TV vol 5 (BVAA-15 BVLA-15) | Talk |
| 1996.05.22 | Say You Club TV vol 6 (BVAA-16 BVLA-16) | Talk |
| 1997.03.26 | Sakurai Tomo no Hitasura Seiyuu Shigan (PCVP-12092 PCLP-00644) | Talk |
| 2001.10.10 | AX November 2001 [DVD] | talk |