Kōdai Inaoka is a Japanese voice actor affiliated with the talent agency Aoni Production. He is from Nara Prefecture and his birthday is February 25, though the year of his birth has not been publicly disclosed. His hobbies include playing guitar and drums, caring for indoor plants, and watching football matches from foreign leagues. He also speaks the Osaka dialect.

Inaoka became interested in pursuing a career in voice acting after watching the performance of fellow voice actor Nakamura Yūichi in the anime series Ore no Imōto ga Konna ni Kawaii Wake ga Nai, also known as Oreimo.

One of Inaoka's most prominent anime voice roles is Tileman in the 2024 series Kinnikuman: Perfect Origin Arc, a sequel produced by Production I.G. that represents the franchise's first new anime installment in 32 years. His other notable anime television roles include a Gendarmerie in Dragon Ball DAIMA, a Russian Operative in the 2025 series Lazarus, and Attendee C in The Duke of Death and His Maid. He has also performed supporting roles in long-running series such as ONE PIECE, where he voiced Gifter and a pirate, and Mobile Suit Gundam: The Witch from Mercury as a Dominicus Corps pilot. Additional anime credits include Puzzle & Dragons and the Japanese dub of the Chinese animated series Fusho.

Beyond character voice work in animation, Inaoka has an extensive career in narration and voice-over for Japanese television programs. His narration credits include segments for variety and information shows such as Sukkiri, Getsuyō kara Yofukashi, Sekai no Nanda Kore!? Mystery, and S☆1. He has also served as the character narrator for the program Sodate TV, voicing a character named Mameo, and provided the voice for the character Iwao in the historical program Nippon o Tsukutta Meiji no Sankensetsu. His voice-over work includes contributions to programs featuring the idol group Snow Man and the reality show Kiss My Food.

In the field of video games, Inaoka has contributed to several titles. His game credits include roles in Sword Art Online: Alicization Lycoris, Fusho, Frontier Hunter: Erza's Wheel of Fortune, Dragon Ball Z: Kakarot, and Like a Dragon Gaiden: The Man Who Erased His Name.

While Inaoka is still an emerging talent in the voice acting industry, he has demonstrated a strong capacity for narration and a growing list of character roles in major anime productions. He has expressed a desire to portray strong, battle-hardened characters or refreshingly handsome characters in the future.