Here is a bit more info on those Japanese machines:
http://www.quiltingboard.com/vintage...s-t207877.html There may be a generic manual link on there, too.
It is more likely to be a right bobbin holder than a left. You will need to get the larger needle slot since it is a zig zager. I would check with sew-classic for a bobbin case - I think you are looking at less than $10. She also has attachments. (you will need to determine if you have short shank or long shank) Then she has decent bobbins.