I like the anime-styled hair over at DAZ.  Here are some suggestions:

• Mitsu hair (free):  http://www.daz3d.com/i/3d-models/-/3d-bridge-starter?item=5504&_m=d
  * Anime Hair:  http://www.daz3d.com/i/3d-models/-/anime-hair?item=5840&_m=d
• Nyoko Pigtails: http://www.daz3d.com/i/3d-models/-/nyoko-pigtail-hair?item=2874&_m=d
• Miki Hair: http://www.daz3d.com/i/3d-models/-/miki-hair?item=1817&_m=d
• XinXin Hair (free): http://www.daz3d.com/i/3d-models/free-3d-models/anime-uniforms?item=8863&cat=382&_m=d
• Nyoko Short Hair (free): http://www.daz3d.com/i/3d-models/-/aiko-3-0?item=2866&spmeta=rq&_m=d
  * A3 Ponytail: http://www.daz3d.com/i/3d-models/-/a3-ponytail?item=2891&_m=d
  * Various Anime Hair from Studio Maya / MayaX (free): http://www.3digitalcrafts.net/studiomaya/1download/wig1/wig01.html

You might try the Aiko 3 and Hiro 3 bundles at DAZ.  Both have good anime hair.  Other options include Babs Tails (also at DAZ). 

And, PropsChick (here at Rendo) and 3Dream/Plus3D/mairy have some hair that could be used in an anime setting.

Ali also makes anime-ish hair: http://www.renderosity.com/mod/bcs/index.php?vendor=ali

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