Japanese pornography has some unique features which separate it from pornography in other cultures, especially Western pornography. The most common theme in Japanese porn are schoolgirls, who are sexually submissive and often bound. It is quite common and frequently translated and exported to Western cultures because of its large spectrum of themes and media. Japanese erotica has a reputation in the West as being sado-masochistic and youth-centered.

Pornographic video (called “adult video” or “AV” in Japan or sometimes “Japanese adult video” or “JAV” outside of it) covers wide themes and its only limit is censorship laws.
Some AV Studio Label in Japan
- Arisu Japan
- Atlas 21
- Bauhaus
- Big Morkal
- Garomage – nude photography videos
- Giga
- h.m.p. – publishes Tiffany label
- Indies Media
- Japan Home Video
- Kasakura Shuppansha
- Kuki- major studio
- Kurisutaru Eizou
- Lahaina Tokai
- Moodyz
- Next 11
- Prestige
- Reddo Totsugekitai
- S1 No.1 Style
- SexiA
- Shai Kikaku
- Soft On Demand – former indie studio turned major, I Energy is one of their labels
- Take Shobou
- Total Media Agency
- Uchu Kikaku – major studio associated with Eichi Shuppan publishers
- Yellow Box
Reference: http://en.wikipedia.org/wiki/Japanese_pornography