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The line comes from Gintama, the long-running Japanese anime and manga series centred on samurai-era comedy, and is spoken by Katsura Kotaro, a former revolutionary leader known for his earnest, eccentric personality. Throughout the series, other characters shorten his name to Zura, prompting his repeated correction that it is Katsura, not Zura, a running gag that fans quickly adopted. Clips of the exchange spread through anime edits, reaction videos and soundboards, where the line now works as shorthand for correcting a mistaken name or identity.
About this sound
Kotaro from Gintama delivers his famous Ja nai, Katsura da correction, a short anime voice clip fans use for reveals, corrections and identity jokes.
This short clip captures Katsura Kotaro, the eccentric samurai leader from Gintama, firmly correcting someone who has called him by the wrong name. Delivered in a confident, slightly exasperated tone, the line lands as a quick denial followed by a proud declaration of his real name, making it instantly recognisable to anime fans. The voice is clear and theatrical, with just enough comic timing to feel like a punchline on its own. Played over a reveal or a mistaken identity moment, it turns a simple correction into a joke, giving viewers an immediate payoff and a familiar character beat they can quote along with.
