An image from Gaiking: Legend of Daiku-Maryu, one of the productions that also features Gou Koga.
Gou Koga
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One Piece: Clockwork Island Adventure
2001
Buddha: The Great Departure
2011
Yu☆Gi☆Oh!
1999
One Piece Episode of Sabo: The Three Brothers' Bond - The Miraculous Reunion and the Inherited Will
2015
The Birth of Kitaro: The Mystery of GeGeGe
2023
Glitter Force Doki Doki
2013
Digimon Universe: App Monsters
2016
Gaiking: Legend of Daiku-Maryu
2005