The Sharingan is the signature eye technique of the Uchiha clan in Masashi Kishimoto's Naruto manga and anime, first appearing in the early 2000s. Its red iris and tomoe pattern became one of the series' most copied visuals, later evolving into the Mangekyo Sharingan with even stronger abilities. Clips of its activation sound spread through anime edits, AMVs and meme pages because the rising effect instantly signals heightened perception and danger, making it a shorthand fans recognise even without seeing the original scene.