Before anybody gets any idea of Barbie and some other stuffs, the dolls that I will mention is a 'ball-jointed doll'. It's originated from Japan in 1999 which they were popularly called by term of 'super dollfie. Those dolls are made from polyurethane resin, a porcelain-like, hard, dense plastic and 60cm or 2ft tall. They're usually heavier than most western made dolls. The dolls are influenced by anime so they're not anatomically correct, furthermore it can be customized according to customer preferences.
Above picture is an example of boll jointed dolls owned by R727. Morever, I must say that I love all of R727 dolls photo since he can compose their position very well to enhance the story behind it.
My first time ever discover ball jointed dolls is when I was still in highschool after reading an article about it. Though it doesn't include too many details and only few pictures of it, I definately fall in love with ball jointed dolls. Years later, I rediscover back after I see R727 doll' photos and it makes me want to own one or two of the dolls (well I have in mind of what kind of doll I want it to be).