Acutex was basically a marketing scheme for distributing Azden/Piezo cartridges in the US, and this doesn't look like A/P construction. It does look like (what little we can see in the typically poor photos) Glanz style. We'd want to look for a tiny setscrew in the round shank/insertion tube/thingy, as we see in some Pioneers and JVCs and Denons.
There's some resemblance to the Glanz MG-2S.
Interesting question, and it would be nice to nail down the identity of the OEMs behind so many Japanese brands.