Biography
Takeharu Oonishi (大西 健晴, Ōnishi Takeharu, born July 8, 1967) is a Japanese seiyū (voice actor) and stage actor from Nara Prefecture. He is affiliated with Arts Vision and is a founding member of the theater company Akapera. He speaks the Kansai dialect. He is married to voice actress Masayo Kurata (倉田 雅世).
Filmography
Cast Credits

YAIBA: Samurai Legend
Character: Gerozaemon Geroda (voice)
TV • 2025

The Fable
Character: Kenjiro Takoda (voice)
TV • 2024

Kaitou Sentai Lupinranger vs. Keisatsu Sentai Patranger
Character: Kunks Butylmercaptan (voice)
TV • 2018

Case Closed: The Crimson Love Letter
Character: Producer (voice)
MOVIE • 2017

Mobile Suit Gundam: The Origin IV – Eve of Destiny
Character: Anaheim Electronics Plant Manager (voice)
MOVIE • 2016

Parasyte -the maxim-
Character: Ancient Languages Teacher (voice)
TV • 2014

Parasyte -the maxim-
Character: Delinquent (voice)
TV • 2014

Tokumei Sentai Go-Busters
Character: Tireloid (voice)
TV • 2012

Hunter x Hunter
Character: Cherry (voice)
TV • 2011

Hunter x Hunter
Character: Tocino (voice)
TV • 2011

Hunter x Hunter
Character: Worm (voice)
TV • 2011

Atashin'chi: The 3D Movie
Character: Shikai (voice)
MOVIE • 2010

Gintama: The Movie
Character: Murata Tetsuya (voice)
MOVIE • 2010

Kekkaishi
Character: Madarao (voice)
TV • 2006

Pururun! Shizuku-chan
Character: Ametarou (voice)
TV • 2006

Intrigue in the Bakumatsu – Irohanihoheto
Character: Kawai Tsuginosuke
TV • 2006

Death Note
Character: Gukku (voice)
TV • 2006

Guyver: The Bioboosted Armor
Character: Toshiaki Hayami / Bio-Freezer (voice)
TV • 2005

Crayon Shin-chan: The Glorious Storm-invoking Yakiniku Road
Character: Taicho
MOVIE • 2003

The Boy and the Sea Turtle
Character: Man (voice)
MOVIE • 2002