Japan's industrial output fell 38pc in February (year-on-year), mostly concentrated into the last four months. No major economy imploded at this speed in the 1930s. The country has been hit by a double shock. As an export power it has taken the brunt of Anglo-Saxon belt-tightening: as the world's top creditor it is cursed by a "safe-haven" currency that soars in moments of danger – largely because the Japanese bring home their wealth till the storm passes. Normally, Japan can cope. This time, the yen's rise has pushed the economy over a cliff.