Collaborations between Hajime Oikawa and Kow Otani
| Film Title | Year | Hajime Oikawa | Kow Otani |
|---|---|---|---|
| Gamera 3: Revenge of Iris | 1999 | Production designer | Composer |
| Gamera 2: Attack of the Legion | 1996 | Production designer | Composer |
| Gamera, the Guardian of the Universe | 1995 | Production designer | Composer |