Most guides tell you to incorporate in Japan before you've sold anything. This calculator asks 6 questions and tells you which of 3 real entry paths fits: desk validation (under $2,000), cross-border selling with no legal entity ($3,000-10,000/yr), or a full entity plus local hire ($150,000+/yr). Built by Japan Brief, a newsletter for founders and operators evaluating a Japan market entry. Free, no signup, single static page.