Kunihiko Yasui is a Japanese voice actor and music navigator born on December 12, 1960, in Nagoya, Aichi Prefecture, Japan. He is a graduate of Nihon University and is currently affiliated with the talent agency 81 Produce.

Yasui is perhaps best known for his long-standing role as Iori Yagami in SNK's The King of Fighters video game series. He provided the voice for the character from the franchise's early days, beginning with The King of Fighters '95 and continuing through The King of Fighters XIII. His performance was instrumental in defining the character's dark and charismatic persona. The role was taken over by Takanori Hoshino starting with The King of Fighters XIV. He also voiced the character in related media, including the 2005-2006 original net animation The King of Fighters: Another Day.

His work in anime spans several decades and includes a variety of prominent roles. In the Grappler Baki franchise, he voiced the Chinese Kenpo master Retsu Kaioh. He also took on the role of Schwarzkopf in the Getter Robo: Armageddon OVA series and its sequel, Getter Robo Arc. Other notable voice roles include Yui Shosetsu in the OVA Ninja Resurrection, Irimote in Demon Beast Invasion, and Hideki Meino / Duke Pluto in Venus 5, as listed in the query. He has also appeared in long-running series such as Case Closed (credited with multiple guest roles), Naruto, and Attack on Titan.

Beyond animation and video games, Yasui's career includes work in tokusatsu, dubbing foreign films and television series, and drama CDs. He notably portrayed Nezi Black in Denji Sentai Megaranger and has had roles in other Super Sentai series like Juken Sentai Gekiranger and Samurai Sentai Shinkenger. His dubbing work includes providing the Japanese voice for characters such as Agent Brown in The Matrix and Aiden Shaw in Sex and the City.

A notable recurring collaboration in his career was with SNK. In addition to his voice work as Iori Yagami, he was invited by the company to participate in the character image band, Band of Fighters, which was based on The King of Fighters series.