Dr. Koishi no jiken carte 4 (2008) Online
| Credited cast: | |||
 | Isao Hashizume | - | Dr. koishi |
| Mari Nishio | - | Sayuri |
| Rest of cast listed alphabetically: | |||
| Yoshimi Ashikawa | ||
| Terumi Azuma | ||
| Saburô Ishikura | ||
| Masakazu Itou | ||
| Satoshi Jinbo | ||
| Ryûji Katagiri | ||
| Hisayuki Nakajima | ||
| Yorie Yamashita |