Actually, the Japanese aren't a greedy people. If anything, I'd guess they rebuild by cutting export prices, not hiking them.
If product shortages occur (does anyone really want a Yaris, though?) it will likely be the US retailers that reap the profit, not the Japanese manufacturers.
The West is strangling them. They should take over the oil fields in Indonesia. First, they'll need to bomb Pearl Harbor. They'll need mini-subs like last time, and Paul Allen has one in yellow.