I'm not sure if someone had already known but... finally I found the hi-res scan of sound team jdk member's group photo in 1992 from the album "Dragon Slayer J.D.K. Special" advertisement:
https://archive.org/details/micomBAS.../n202/mode/1up
here is my edited version (cleaned the text above):
https://imgur.com/a/hEaRDAL