I don't know. We aren't a general Japanese movie soundtrack database, so we don't need to complete "Opai Volleyball". It's only in there for Naoki Sato.
Kaori Mochida seems to only have written some lyrics to Inu Yasha songs. Takao Tajima has a couple of vocal credits for anime theme songs. I don't think there is a strong case here to cover their full discographies.
Can you read our new scope guidelines and post your thoughts on them?
https://vgmdb.net/forums/showthread.php?t=22321