Tetsu Kimishima is a Japanese voice actor from Hokkaido. He is represented by the agency Axel One. His birthday is September 18, his blood type is AB, and his height is 178 centimeters. His birth year has not been publicly disclosed.

Kimishima began his voice acting career in 2014. While still attending a voice actor training school, he made his debut in a drama CD. He has since built a steady career taking on a variety of supporting and ensemble roles in anime, video games, and dubbed foreign films.

His anime credits include roles in several television series. In 2016, he appeared as a delinquent in ViVid Strike!, a male student in SUPER LOVERS, and as Yamazaki in Mob Psycho 100. The same year, he played a mechanic in Ragnastrike Angels and an agency worker in Danganronpa 3: The End of Hope's Peak High School - Despair Arc. His later anime work includes roles in HUGtto! PreCure, 3D Kanojo Real Girl, The Marginal Service, and Ars no Kyojuu. He has also voiced characters in the film Black Butler: Book of the Atlantic.

Beyond anime, Kimishima has contributed to video games such as Ayakashi Gohan, Quiz RPG: The World of Mystic Wiz, SA7 Silent Ability Seven, and Code Geass: Lost Stories. His voice acting work also extends to live-action dubbing and narration. He provided voice work for the 2024 Super Sentai series Bakuage Sentai Boonboomger.

Regarding the example role mentioned, no information could be verified about him playing Nyankichi in the series DYNAMIC CHORD.