His early career was a slow burn—guest roles as betrayed retainers, stoic detectives, or the silent villain's right-hand man. However, his breakthrough came in 2015 with the late-night noir series (深夜の上野), where he played a disgraced forensic accountant with a hidden violent streak.
This style made him the perfect bridge between the jazz-influenced City Pop of the 80s and the emotional, keyboard-heavy ballads of the 90s.
As of 2025, Aizawa is set to appear in two high-profile releases: