It does mention using the debris, much of which seems pretty clean wood. The problem of course is that there will be bodies and possessions in the debris and it can't be just scooped up. But I do think it can and should be used somehow. He says Japan is good at earthquake-resistant windmills, and he is confident about bringing in a lot of renewable energy.
So once the radiation monster is tamed, rebuilding might be pretty rapid. One wonders how it will be zoned. Also, if there is land that can not be farmed or safely lived on, could it not be a windmill farm and/or solar farm? And or tidal farm? By the sea of course. The grid is probably pretty intact, which they say is not a good grid, and different parts of Japan don't even use the same current or whatever.
What houses and buildings survived? Concrete? Wood is good for earthquake but bad in water situations like floods.
But surely they could right now be building huge swimming pools or artificial lakes or ponds lined with cement to contain bad water. Why are they not starting? If all is well later, call it an Olympic water park or whatever. mg