My top 5 would be these...
1. Nana Kitami
2. Rei Himekawa
3. Haru Ayame
4. Shinobu Ebihara
5. Rin Aoki
Between those 5, my JAV needs are all satisfied.
Looks like Rin Aoki could be in danger of losing her spot if Misaki Kasahara releases more material. Only 2 releases so far (she's new) but for me she is the most ideal among the mature JAV idols (and that's saying alot since I'm a fan of many of the mature JAV idols). Her lower body is very tone (with some defined muscle in her legs), with a thick round PERFECTLY SHAPED ass. It's very obvious she works out regularly. Her ass alone puts more 20 somethings to shame based on firmness/shape/thickness. Plus she has great sexual energy on-screen.
It's too early for me to put her in my honored top 5 list, but if she keeps up the quality that she showed in her first 2 releases then she'll be resting comfortably below Ebihara in no time. :hero: