Onodera Mariko events
Some of the events that Mariko has appeared in are as follows.
| 1994.12.04 | Seiyuu Grand Prix Commemoration Event |
| 1994.12.10 | Seiyuu Grand Prix Commemoration Event |
| 1994.12.11 | Seiyuu Grand Prix Commemoration Event |
| 1995.03.25 | 3DO Real in Akihabara |
| 1995.03.25 | 3DO Real in Ikebukuro |
| 1995.03.26 | 3DO Real in Akihabara |
| 1995.06.03 | Tokyo Toy Show |
| 1995.06.04 | Tokyo Toy Show |
| 1995.08.03 | Anime Seiyuu Daikoushin |