Atsuki Tani is a Japanese actor and voice actor born in Tokyo on January 22, 1959. He is affiliated with the talent management firm Aoni Production. Tani began his career in theater, working with companies such as the Shakespeare Theatre and Bungakuza, where he became a full member before transitioning his primary focus to voice acting. He has been active in the industry since the 1980s.

Tani is particularly recognized for his work in dubbing foreign films and television series, where he is the regular Japanese voice for actor Liam Neeson and has also dubbed performances by actors such as Dolph Lundgren and Mark Strong. In the realm of animation and video games, he is known for voicing the Master Chief in the Japanese versions of the Halo video game series and the animated project Halo Legends. His extensive anime filmography includes roles in Fullmetal Alchemist: Brotherhood as Master Hawkeye, Dragon Ball Super as Obuni, and GeGeGe no Kitarō as Dorotabō. He has also taken on voice roles in tokusatsu productions, most notably as the antagonist Shougun DonArmage in Uchu Sentai Kyuranger.

Among his notable anime roles, Tani voiced Inspector Anderson in Great Pretender, Ling Bo in Lupin the Third: Part 5, Georg Dalmas in Hortensia Saga, Pan Guanglín in Fist of the Blue Sky Regenesis, and Toshirō in the Road to You: Kimi e to Tsuzuku Michi ONA. His role in Hortensia Saga was a continuation of a legacy, as he took over the character from the late Unshō Ishizuka, who had voiced Georg in the original game. He has also voiced Temujin in The Silver Guardian 2. In addition to these, his work spans a wide range of other series, including Carole & Tuesday, Altair: A Record of Battles, and Delicious Party Pretty Cure.