Several simmering economic disputes between the U.S. and Japan came to a boil last week. In one case, the White House had threatened to impose trade sanctions against Japan if it did nothing to open up its construction business to American companies by March 30. Before the deadline arrived, though, Tokyo agreed to give U.S. companies the same chance as their Japanese competitors to bid on 14 public works projects, valued at $17 billion. But the Japanese government did not guarantee American firms any share of the construction work.
Meanwhile, Congress was moving closer to slapping sanctions on Toshiba, the Japanese...