The hardships that the Japanese have been used to deal with ever since the atomic bomb dropped on Hiroshima (and probably way before that), combined with the Japanese way of living life, have made possible an engineering miracle less than a week after the earthquake ripped the Great Kanto Highway in Naka into pieces. A tiny miracle, compared to others achieved by the Japanese in these dire times, but one that is a testimony of how a natural disaster cannot break the human nature.
The two photos you see here picture the road right after the quake split it apart (first photo) and right before the reopening, after the road got repaired (photo 2).
Some might argue that the stretch of road damaged by the quake was not that long, hence the quick repair, but we know from experience that in other places on this Earth, a pothole significantly much smaller in size and less impressive in nature takes at times years to fix. And when it gets fixed, it's only temporary, as it resurfaces months later.