I have two Japanese ZZ machines that use the high shank feet and attachments, so they are out there.
A gazillion of these machines were made and imported by hundreds of companies. Very few under their own name. J- A 12 could be Brother or Koyo according to a chart found at the Yahoo Japanese machines group.
Sew-Classics has a "How To" section to determine your presser foot type, and a fair to midlin choice of feet too.
Also some of the Japanese ZZ machines park the needle to the left when on straight stitch. If you buy a SS foot you'll need one that's offset for this.
Joe