was a short-lived Japanese pop group made up of five Hello! Project Kids members led by Mari Yaguchi of Morning Musume. Yaguchi acted as a mentor and the group released two singles. ZYX is important in that it is the first unit that Hello! Project Kids officially joined with the second being Aa! formed in 2003, the third being Berryz Kobo in 2004, and the fourth being Cute] in 2005. As Saki Shimizu and Momoko Tsugunaga were selected to become members of Berryz Kobo in 2004, the activity of ZYX ended.

ZyX is a Japanese erotic bishojo video game maker. Some of their products have been localized in North America by JAST USA under the G-Collections label, and most of them feature designs by either Masahiro Yamane or Keiji Muto.

The Zygii or Zygians, were described by Strabo as a nation to the north of Colchis. He wrote:

And on the sea lies the Asiatic side of the Bosporus, or the Syndic territory. After this latter, one comes to the Achaei and the Zygii and the Heniochi, and also the Cercetae and the Macropogones. And above these are situated the narrow passes of the Phtheirophagi (Phthirophagi); and after the Heniochi the Colchian country, which lies at the foot of the Caucasian, or Moschian, Mountains. (Strabo, Geographica 11.2)