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Jack-Aku is a one-shot antagonist in the 2001 animated TV series Samurai Jack. He is Samurai Jack under the influence of Aku via an infection.

As a mix of Jack and Aku, he was both voiced by Phil LaMarr and the late Mako Iwamatsu respectively.


Jack-Aku was walking on a snowy mountain in "Episode XLII: The Aku Infection", looking to find a portal. While the Jack half wishes to use it, the Aku half wishes to destroy it.


The part of him that is Jack is a bit scared and wants to find help, but the part that is Aku is greedy and wants to destroy everything. Due to being a mix of Jack and Aku, he constantly switches between being kind and mean.





           SamuraiJack Logo.png Villains

Black Mass
Aku | Demongo | Scaramouche the Merciless | Jack-Aku | Mad Jack | Minions of Set | The Gentleman | X-49 | DJ Stylbator | Imakandi | Pig Sheriff | Cult of Aku (High Priestess & Daughters of Aku)

Guardian | Demonic Spirit | Lava Monster | Huntor | Chritchellites | Cronus | Gordo the Gruesome | Josephine | Lazarus-92 | Omen | The Dominator