I'm unable to find Ogata-san in Twins Teacher for the time being. I'd need more episodes, but knowing how hard this 1993 drama is to get I doubt that will happen anytime soon.
This "Ayumi Ogata" person appears several times in Ayu's album & single credits though:
Special thanks to → Aneki- A Song for ××
- LOVEppears
- Duty
Artist Management: Ayumi Ogata- A BEST
- evolution
- Ｍ
- NEVER EVER
- Endless sorrow
- UNITE!
Maybe in more, not sure...