Yzak's Japanese seiyuu is Seki Tomokazu. Some notiable characters other than Yzak that he's voiced are: Kinomoto Toya from Cardcaptor Sakura, Sohma Kyou from Fruits Basket, Sagara Sousuke from Full Metal Panic!, Chichiro from Fushigi Yuugi, Domon Kasshu from G Gundam, Shindou Shuichi from Gravitation, Terashima Nobuo from NANA, Van Fanel from The Vision of Escaflowne, and Hidaka Ken from Weiss Kreuz He also voices for video games, such as Luis Virgil from Xenosaga.
Some clips of Yzak's Japanese voice:
- "They'll be fine. Anyway, we'll deliver these three units back first. Don't let them get damaged before we've handed them over to Commander Klueze."
- "Shut up! I'm the commander now! Don't order me around, civilian!"
- "That's why I still wear a military uniform. Although that's about the only thing I can do ... I can still do something for PLANT and our comrades who have died. That's why you need to do something as well. Do you intend to let all of your power go to waste?!"
- "Dearka, we're destroying this thing! If there's a second shot, PLANT will be finished for sure! We will destroy it no matter what!"
Yzak's English voice actor for the original release of the Gundam SEED dub is Michael Adamthwaite. Other notable characters aside from Yzak that he has voiced are: Domyoji Tsukasa from Hana Yori Dango, Seiji Ogata from Hikaru no Go and Ribbons Almark from Gundam 00.
Some clips of Yzak's English voice (the same ones as above):
- "I don't think they'll have any trouble. Let's stick with the plan, we'll leave with these three. Let's get them to Commander Le Creuset before they get damaged."
- "Shut up! I'm the one in command here! Stop giving orders you damned civilian!"
- "That's why I still wear a military uniform. It's the only thing I know. But also because I think I can make a diference, for the PLANTs and for all the friends who've died. That's why you have to do something, too. You have the ability, why not put it to use?!"
- "Dearka! We're destroying this! If they get off another shot like that, the PLANTs are finished. We're taking it out, no matter what!"
Yzak's English voice actor for the release of the Gundam SEED Remaster dub is Daman Mills. Other notable characters aside from Yzak that he has voiced are: Ginshi Shirazu from Tokyo Ghoul, Jyugo from NANBAKA and Tanaka from One Piece Film: Gold.
Clips coming soon!