Masaki Aizawa (相沢 まさき, Aizawa Masaki, January 19, 1965) is a Japanese voice actor (seiyuu) from Hokkaido who is represented by Office Osawa. His old stage name is 相沢 正輝 (same reading). Formerly, he was affiliated with Production Baobab and Bell Production. His hobby is reading.

Mobile Suit Gundam GQuuuuuuX
Chapman Jirom (voice) · (1 episode)
2025

Catch Me at the Ballpark!
Field Manager Tadahiro Matsudo (voice) · (4 episodes)
2025

T・P BON
Monarch (voice) · (1 episode)
2024

Undead Murder Farce
John H. Watson (voice) · (4 episodes)
2023

Yu Yu Hakusho - Two Shots / All or Nothing
Ōtake (voice)
2018

One Piece: Episode of Skypiea
Wyper (voice)
2018

The Irregular at Magic High School: The Girl Who Summons the Stars
Ralph Hardy Mirphak (voice)
2017

Uchu Sentai Kyuranger
Judge Inda · (1 episode)
2017

Parasyte -the maxim-
Kazuyuki Izumi (voice) · (13 episodes)
2014

Parasyte -the maxim-
Officer Worker「A」(voice) · (1 episode)
2014

Parasyte -the maxim-
Man (voice) · (1 episode)
2014

Parasyte -the maxim-
Professor (voice) · (1 episode)
2014

Parasyte -the maxim-
Taoka (voice) · (1 episode)
2014

Yona of the Dawn
Li Geun-Tae · (24 episodes)
2014

Hunter x Hunter
Bendot (voice) · (5 episodes)
2011

Hunter x Hunter
Mizuken (voice) · (3 episodes)
2011

Is This a Zombie?
Mystletainn (voice) · (3 episodes)
2011

Bleach the Movie: Hell Verse
Gunjo (voice)
2010

Death Note Relight 2: L's Successors
Anthony Rester (voice)
2009

Eden of the East
Opposition Party Member (voice) · (1 episode)
2009

Inazuma Eleven
Heikichi Toudou (voice) · (2 episodes)
2008

Kaiji
Facility Manager (voice) · (2 episodes)
2007

Sword of the Stranger
Yue-Shen (voice)
2007

Gift: Eternal Rainbow
(12 episodes)
2006

Death Note
Masahiko Kida (voice) · (1 episode)
2006

Black Lagoon
Rowan (voice) · (1 episode)
2006

Inukami!
Master · (26 episodes)
2006

The Hills Have Size
Matsubara Hisashi · (2 episodes)
2005

Jing: King of Bandits
Ginjou (voice) · (13 episodes)
2002

Jing: King of Bandits
(3 episodes)
2002

The Twelve Kingdoms
Shōryū (voice) · (45 episodes)
2002

Chobits
Tetsuya Omura (voice) · (4 episodes)
2002

The Siamese: First Mission
Defense Minister (voice)
2001

X
Kusanagi Shiyū (voice) · (24 episodes)
2001

Fighting Spirit
Date Eiji (voice) · (101 episodes)
2000

Resident Evil 4D Executer
Claus
2000

You're Under Arrest: The Motion Picture
Detective Sugihara (voice)
1999

Master Keaton
(1 episode)
1998

Spriggan
Excavation Research Agent (voice)
1998

Knight Hunters
Hirofumi Takatori · (38 episodes)
1998

Cowboy Bebop
Case Officer (voice) · (1 episode)
1998

Song of Raiyantsuuri
1994

Tekkaman Blade II
Goriate · (6 episodes)
1994

Iria: Zeiram the Animation
Soldier C (voice) · (1 episode)
1994

Red Baron
Norman · (49 episodes)
1994

New Cutey Honey
(voice) · (1 episode)
1994

New Cutey Honey
Robber (voice) · (1 episode)
1994

The Legacy of Al Caral
Guard B (voice)
1993

Oruorane the Cat Player
Middle-Aged Man
1992

Tokyo Babylon
Man (voice) · (1 episode)
1992