The academic name is Dorcus rectus and it is commonly called as tiny stag beetle. It's one of the stag beetles seen most usually in Japan. I easily found it in my childhood and I might have been rather disappointed. Thus, I'm not sure who wants this model.

These files were revised for resin 3D printer. Tiny_male.stl Tiny_female.stl

Making video. https://youtu.be/38CpwMsF5cg