Justin plays piano and organ for the Texas band, The Peach Truck Republic, which involves several Funimation workers such as Jerry Jewell and Evan Jones.
Aaron Dismuke, the voice of Al in FullMetal Alchemist, is Justin Cook's cousin.
Justin voiced Raditz in the console game "Dragonball Z: Budokai"
Justin is the English voice director of the anime Fruits Basket. On the US, DVD Volume 4, he leads an audio interview with the entire Fruits Basket english voice cast.
Justin did five commentaries for the three episodes of the last Yu Yu Hakusho DVD, "Yusuke Rediscovered"
On September 11, 2001, Justin was recording episode 6, "Three Monsters", of Yu Yu Hakusho.
His favorite season from Yu Yu Hakusho is Season 4, or the Demon World Tournament Saga.
His favorite villain from Yu Yu Hakusho is Riazen.
His favorite movie is Lawrence of Arabia.
His favorite book is Casino Royale.
His favorite color is Green.
His favorite food is Mackerel sushi.
His favorite video game console is Xbox. His second favorite is PlayStation 2.
Is a huge Star Wars video game fan.
Competed in a high school dance competition
Miles Davis and Herbie Hancock are his two most favorite musicians
Likes classic rock, jazz, and rap music. Hates country music.
He was forced to play the piano when he was younger. He eventually quit, but later started taking lessons again.
Never went to school or trained to be a voice actor
Is good friends with fellow FUNimation voice director and voice actor Christopher R. Sabbat
Is a fan of the Cowboy Bebop Anime and Soundtrack.
His first impression of Yusuke from Yu Yu Hakusho was that he was "going to be a real pain to cast".
Has seen Yu Yu Hakusho roughly 10 times.
Likes directing, writing, and voice acting all equally.
His second favorite character he voices is Haru from Fruits Basket.
His favorite character he voices is Yusuke from Yu Yu Hakusho
Surprisingly, Justin does the voice of Puu from Yu Yu Hakusho.
Justin appeared in five conventions overall - Otakon 2003, Otakon 2005, Wizard World Philadelphia 2004, Wizard World Chicago 2004, and Ushicon 2005
His favorite ending song in Yu Yu Hakusho is "Daydream Generation".
His favorite character from DragonBall Z is Trunks.
He prefers Yu Yu Hakusho over Dragonball Z
Appeared in just two Anime conventions - Otakon 2003 and Otakon 2005
He loves to drink coffee.
Justin : (asked if he knew he was going to be the producer & voice actor for Yu Yu Hakusho) Justin: No, I didn't have a single clue. As a matter of fact, in my mind it wasn't even an option. It just kind of fell in my lap the next day during auditions. My producer, Barry Watson, was in the room with us and upon having a long day of auditions with having nothing really jump out and grab us as the character voice for Yusuke, Barry had asked me to jump in the booth and so I did and then he sent me out of the room for about three hours or so and after a couple more auditions he came out and let me know that he wanted me to play the role as well as direct the series.
Rayreilee: How did you get interested in Yu Yu Hakusho?
Justin: This is kind of funny... Cuz there really wasn't anything else to get intersted in. The honest truth of it is, at the time, FUNimation was really mainly just producing as far as anime was concerned, Dragon Ball Z. But we got two new shows in about the same time, one was called Blue Gender, which was a 26-episode sci-fi story, and Yu Yu Hakusho. I had kind of been given a bit of a promotion to test the water and see how I would do on directing a show and Yu Yu was the show that I was asked to work on. And so that being the first thing I ever got to work on I really gave it the extra effort if you will and I kind of just fell into the show upon trying to do some simple research and I just kind of ended up obsessing over it.
Gerry: How are you able to change your voice to do different characters?
Justin: I think it's an immense pychotic behavior. Lol. No. I guess I look at it and say, 'Oh, it's easy.' But it's probably upon getting into the character. A character like Yusuke I can kind of get into his excitement and his charisma and where he wants to go and that kind of indicates where the voice is going to be. His voice of course if very close to my own, but then with a character on Dragon Ball Z like Raditz or Super Buu where we've got more of a villainous character, I can just kind of draw on, well I hate to say that I have a whole bunch of evil inside of me, but you know, I can just draw on some of the more barbaric mannerisms if you will.
Justin: I became a voice actor when I started up with FUNimation Productions as an ADR engineer, which is actually not the voice actor but it's the guy who records the voice actors. And for about a year and a half I worked with Chris Sabbat, who was our voice director, and he kind of trained me on everything I needed to know and he eventually asked if I'd audition for a role and I did. The first role I got was the role of Dende on Dragon Ball Z and then from there I just kept putting in my auditions and keeping my fingers crossed.