Japanese (Language) Art Links

It's difficult to rate the appropriateness of artists websites, unlike comics they vary greatly by picture, and many sites have areas for different levels of artwork. These (PG, R, X) ratings are usually on the safe side.
You should be careful about what each site my say about itself. The content on the site may have changed since the last time I visited, or the content may be more random than I expected.

R Art

Akira M
Lots of cute catgirls, and more.

Elflite
By Akira Agata, possibly the most endowed women on any site.

Favorite Empress
Very nice cell-shaded artwork. Mostly original, but there are a few pieces of anime character art.

Loer
Busty sexy women. It seems odd to find western characters, even 7 of 9 from Star Trek, and the female Terminator from T3.

Manhattan Project
No Tifa art anymore, mostly original characters, but some Sailor Moon.

Milk Tank
Amazing artwork. I remember seeing artwork of Tifa, and even a busty Rikku. Lots of wonderful stuff (if only he'd draw the two I mentioned more than once). Older artwork is downloaded in zip files.

Mujoh
Very nice Tifa artwork. There's even a picture of AC Yuffie.

NGL- A fair amount of Tifa artwork, as well as some other video game girl artwork.

X-Rated Art

Koshow
Mostly original characters.