[CHz]

I haven't been able to find any information about this group (not to be confused with the eroge developer Witch), but a few pages on Erogamescape perhaps suggest a connection with Go Oami's later company CHOIR: Yasuhito Watanabe is credited as part of "CHOIR/Witch" for his work on the SNES version of Dragon Knight 4, and both CHOIR and Witch are credited for the DOS version of Words Worth, despite the game predating CHOIR's posted incorporation by four years.

Some definite Witch works:

• Dragon Knight 4 (PC-98, 1994): Go Oami, Masaki Sugo, Yoichi Shimizu, Tsuyoshi Fukutomi
• Doukyuusei (TG-CD, 1995): Go Oami, Masaki Sugo
• Doukyuusei 2 (Saturn, 1997): Go Oami
• Dragon Knight 4 (PSX, 1997): sound arrange (no specific members listed)

And some unconfirmed but possible works:

• Words Worth (PC-98, 1993): Masaki Sugo, Yoichi Shimizu (Witch credited by Erogamescape)
• Isaku (1995, DOS): Witch credited by Erogamescape
• Dragon Knight 4 (SNES, 1996): Yasuhito Watanabe (CHOIR/Witch) credited by Erogamescape
• Shadow Struggle (PSX, 1996): Masaki Sugo, Yoichi Shimizu, Yasuhito Watanabe (Witch uncredited in the game)