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Acting
January 19, 1965
Hokkaido, Japan
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.

Chapman Jirom (voice)
2025

Field Manager Tadahiro Matsudo (voice)
2025

Monarch (voice)
2024

John H. Watson (voice)
2023

Ōtake (voice)
2018

Wyper (voice)
2018

Ralph Hardy Mirphak (voice)
2017

Judge Inda
2017

Kazuyuki Izumi (voice)
2014

Officer Worker「A」(voice)
2014

as Chapman Jirom (voice)

as Field Manager Tadahiro Matsudo (voice)

as Monarch (voice)

as John H. Watson (voice)

as Ōtake (voice)

as Wyper (voice)

as Ralph Hardy Mirphak (voice)

as Judge Inda

as Kazuyuki Izumi (voice)

as Officer Worker「A」(voice)

as Man (voice)

as Professor (voice)

as Taoka (voice)

as Lee Geun-Tae (voice)

as Bendot (voice)

as Mizuken (voice)

as Mystletainn (voice)

as Gunjo (voice)

as Anthony Rester (voice)

as Opposition Party Member (voice)

as Heikichi Toudou (voice)

as Facility Manager (voice)

as Yue-Shen (voice)


as Masahiko Kida (voice)

as Rowan (voice)

as Master

as Matsubara Hisashi

as Ginjou (voice)


as Shōryū (voice)

as Tetsuya Omura (voice)

as Defense Minister (voice)

as Kusanagi Shiyū (voice)

as Claus

as Date Eiji (voice)

as Detective Sugihara (voice)


as Excavation Research Agent (voice)

as Hirofumi Takatori (voice)

as Case Officer (voice)

as Goriate


as Soldier C (voice)

as Norman

as (voice)

as Robber (voice)

as Guard B (voice)

as Middle-Aged Man

as Man (voice)