Hideaki Nonaka is a Japanese voice actor born in Tokyo, Japan on July 23, though the specific year of his birth is not publicly documented. He is affiliated with the talent management agency Arts Vision and has been active in the voice acting industry since 2001.

Nonaka is known for his work across both anime television series and video games. In anime, he portrayed Ryuuken in the series Reikenzan: Hoshikuzu-tachi no Utage in 2016 and reprised this role for the sequel Reikenzan: Eichi e no Shikaku in 2017. He also provided the voice for the character Hikoichi Yakō, a referee known as the Debt Collector for the organization Club Kakerou, in the series Usogui. Additional anime credits include the role of the father of Miyako in the series Shounen Maid from 2016.

In the video game medium, Hideaki Nonaka is recognized as the Japanese voice actor for the Great Deku Tree. He first voiced this character in The Legend of Zelda: Breath of the Wild in 2017 and later reprised the role for Hyrule Warriors: Age of Calamity and The Legend of Zelda: Tears of the Kingdom.

Outside of acting, Nonaka has listed listening to music and playing simulation games among his personal hobbies. He also holds a first-stage qualification in the Japan Professional Mahjong League and possesses the skill of building his own computers. No information is available regarding recurring creative collaborations with specific directors or studios, nor are there any documented major awards or formal accolades associated with his career.