ZyX is a Japanese erotic bishōjo video game maker. Some of their products have been localized in North America by JAST USA under the label, and most of them feature designs by either Masahiro Yamane or Keiji Muto. In May 2009, ZyX was integrated into Contents Traffic Co., Ltd. (株式会社コンテンツトラフィック, Kabushiki-gaisha Kontentsu Torafikku).