The Kagerou Project (カゲロウプロジェクト Kagerō Purojekuto?, lit. "Heat Haze Project"), also known as "Kagerou Daze" (カゲロウデイズ?, lit. "Heat Haze Daze"),[1] is a Vocaloid song series created by Jin (also known as Shizen no Teki-P). The story revolves around the Mekakushi Dan, a group of teenagers with unusual eye-related powers.

The series became popular on the video sharing website Niconico after the release of the song "Kagerou Daze", which also gave the series its name. The song has amassed over 3 million views and is the most popular song of the project. Five light novels have been released, written by Jin and illustrated by Shidu. A manga adaptation with illustrations by Mahiro Satō, began serialization in Monthly Comic Gene on June 15, 2012. A 12-episode anime adaptation titled Mekakucity Actors (メカクシティアクターズ Mekakushiti Akutāzu?, lit. "Blindfold-city Actors") ("Mekakucity" being a portmanteau of "mekakushi" ("blindfold") and "city"), directed by Akiyuki Shinbo and produced by Shaft, aired between April 12 and June 28, 2014.