Nak-Yun Choi is a South Korean male voice actor born on January 27, 1984. He is known for his work in Korean-language dubbing of animated series and video games.

Choi has provided the Korean voice for a wide range of characters in numerous anime series. One of his notable roles is Taizō Kiritsubo in the television series Psychic Squad. He also voices the character Rak Wraithraiser in the anime adaptation of Tower of God. His other prominent anime dubbing credits include Sebastian Michaelis in Black Butler, Heymans Breda in Fullmetal Alchemist: Brotherhood, the title character Blue Dragon in Blue Dragon, and multiple roles in Soul Eater, such as Death Scythe and Ox Ford. He has also contributed to the Korean dubs of films like Berserk: The Golden Age Arc I - The Egg of the King, where he voiced Count Julius.

In addition to anime, his voice work extends to video games. He is credited as the voice of the Talking Flower in the Korean version of Super Mario Bros. Wonder and has participated in various other game projects as player characters or monsters. His professional experience also encompasses work in advertising and film dubbing.