S.Z.K
From Sega Retro
aimless speculation
This is merely me spitballing, but part of me wonders if SZK is a laconism for a family name such as Suzuki. I may be totally offbase, but given the way that name in particular is structured it's stuck to me. The only thing that's a spanner in the works is Sega developers loved welding romanization systems, so Suzuki is sometimes Suduki...