In several years watching JAV, only a couple have ever stood out enough for me to get to know their names.
1) Akira Shiratori - Has got a GORGEOUS face, looks like she could be a someone you know, has a body to kill for, is DIRTY, and clearly enjoys her work.
2) Konomi Futaba - Loli-faced fun. Super pretty and plays the loli girl role better than anyone. Convincing where others clearly overdo the little girl persona. Also does scat, which I'm not normally interested in, but when she does it, I'll give it a go.
Honourable mention for Sakura Aida. Got a face like a smacked arse and whereas some JAV models pull off the sex loving thing, she just comes across as a slut. But she has a certain charm which has me returning to her from time to time.