Japan’s trade boom may be coming to an end after export growth dipped to 2% on a year earlier in February. That was the slowest rate of growth since January 2017 and below the 5% expected by economists. That was due to a 3% slide in electrical equipment, led by televisions, and shouldn’t be a surprise given weakening Chinese import growth and falling business sentiment outside the U.S. The outlier was the automotive sector, with an 18% surge in car exports on a year earlier. The auto sector, now alongside steel, has been a key point of contention in talks with the U.S. Those negotiations...