A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
Zankyou no Terror (Terror in Resonance / Terror in Tokyo) is a 2014 anime series directed by Shinichirou Watanabe.
A light novel series by Nisio Isin, author of the Monogatari Series and Death Note: Another Note. Follows an unnamed narrator through murder mysteries and other adventures.
Zetsuen no Tempest ("Blast of Tempest") is a manga series by Kyou Shirodaira about Shakespeare and the Tree of Genesis and Exodus.
Zettai Junpaku: Mahou Shoujo is a 6-minute doujin OVA based on the manga "Mahou Shoujo" by Raita.
"Zettai Karen Children" is a shounen manga by Takashi Shiina It's about espers and a Japanese organization called B.A.B.E.L. that monitors them.