Tsukasa Masuko (増子司 [ますこつかさ], Masuko Tsukasa) is a video-game composer for the earlier games in the series. An independent composer, he is also known under the pseudonym "Macco".
- Megami Tensei (1987)
- Megami Tensei II (1990)
- Shin Megami Tensei (1992)
- Shin Megami Tensei II (1994)
- Shin Megami Tensei: if... (1994)
- Kyūyaku Megami Tensei (1995) — Arrangement by Hitoshi "YmoH.S" Sakimoto
- Shin Megami Tensei: Devil Summoner (1995)
- Giten Megami Tensei: Tokyo Mokushiroku (1997)
- Devil Summoner: Soul Hackers (1997)
Project SATAN is the alias of Tsukasa Masuko (増子司), composer of the music used in many of the early games in the series.