Shingo Katou is a Japanese voice actor, or seiyū, born on September 3, 1983. He is primarily known for his work in the anime series Aggretsuko, where he has voiced multiple characters since the franchise's debut.

Katou's most prominent and recurring role is as Haida, a spotted hyena and colleague of the main character Retsuko in the accounting department. He has provided the Japanese voice for Haida across all installments of the series. This includes the original 2018 ONA (Original Net Animation), the Christmas special Aggretsuko: We Wish You a Metal Christmas later that year, and all subsequent seasons released through 2023. His performance as Haida charts the character's development from a lovesick, anxious coworker to a more central figure in the later seasons' storylines.

In addition to Haida, Katou has voiced other characters within the Aggretsuko universe. He is credited with the roles of Bakkun, Resasuke, and a CEO, as well as the character Yagu, who temporarily takes over as director of the accounting division. This demonstrates his range in contributing multiple voices to the same series.

Beyond the Aggretsuko franchise, a notable role for Katou includes his work in the 2019 anime Ani ni Tsukeru Kusuri wa Nai! 3. Information regarding his career outside of these roles is limited in the available sources, with his filmography appearing to be closely tied to the long-running Aggretsuko series.