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.
2025Mobile Suit Gundam GQuuuuuuX (1 Episode) as Chapman Jirom (voice)
2025Catch Me at the Ballpark! (4 Episodes) as Field Manager Tadahiro Matsudo (voice)
2024T・P BON (1 Episode) as Monarch (voice)
2023Undead Murder Farce (4 Episodes) as John H. Watson (voice)
2018Yu Yu Hakusho - Two Shots / All or Nothing as Ōtake (voice)
2018One Piece: Episode of Skypiea as Wyper (voice)
2017The Irregular at Magic High School: The Girl Who Summons the Stars as Ralph Hardy Mirphak (voice)
2017Uchu Sentai Kyuranger (1 Episode) as Judge Inda
2014Parasyte -the maxim- (13, 1, 1, 1, 1 Episode) as Kazuyuki Izumi (voice), Officer Worker「A」(voice), Taoka (voice), Man (voice), Professor (voice)
2014Yona of the Dawn (24 Episodes) as Li Geun-Tae
2011Hunter x Hunter (5, 3 Episode) as Bendot (voice), Mizuken (voice)
2011Is This a Zombie? (3 Episodes) as Mystletainn (voice)
2010Bleach the Movie: Hell Verse as Gunjo (voice)
2009Death Note Relight 2: L's Successors as Anthony Rester (voice)
2008Inazuma Eleven (2 Episodes) as Heikichi Toudou (voice)
2007Kaiji (2 Episodes) as Facility Manager (voice)
2007Sword of the Stranger as Yue-Shen (voice)
2006Gift: Eternal Rainbow (12 Episodes) as Unknown
2006Death Note (1 Episode) as Masahiko Kida (voice)
2006Black Lagoon (1 Episode) as Rowan (voice)
2006Inukami! (26 Episodes) as Master
2005The Hills Have Size (2 Episodes) as Matsubara Hisashi
2002Jing: King of Bandits (13, 3 Episode) as Ginjou (voice), Unknown
2002The Twelve Kingdoms (45 Episodes) as Shōryū (voice)
2002Chobits (4 Episodes) as Tetsuya Omura (voice)
2001The Siamese: First Mission as Defense Minister (voice)
2001X (24 Episodes) as Kusanagi Shiyū (voice)
2000Fighting Spirit (101 Episodes) as Date Eiji (voice)
2000Resident Evil 4D Executer as Claus
1999You're Under Arrest: The Motion Picture as Detective Sugihara (voice)
1998Master Keaton (1 Episode) as Unknown
1998Spriggan as Excavation Research Agent (voice)
1998Knight Hunters (38 Episodes) as Hirofumi Takatori
1998Cowboy Bebop (1 Episode) as Case Officer (voice)
1994Song of Raiyantsuuri as Unknown
1994Tekkaman Blade II (6 Episodes) as Goriate
1994Iria: Zeiram the Animation (1 Episode) as Soldier C (voice)
1994Red Baron (49 Episodes) as Norman
1994New Cutey Honey (1, 1 Episode) as (voice), Robber (voice)
1993The Legacy of Al Caral as Guard B (voice)
1992Oruorane the Cat Player as Middle-Aged Man
1992Tokyo Babylon (1 Episode) as Man (voice)