A question remains as to what the exact route would have been because the road was no longer used and had disappeared over the middle ages, but its route is thought to be nearly the same as the modern Tokaido except for the following areas:
中世に大半が廃れたため、正確な道筋については議論されているが、以下の箇所を除いては近世の東海道とおおむね同様の径路と考えられている。