Immigrants are pure economic gold: they arrive ready to work, set up homes and settle in. Japan itself benefited enormously after the Second World War, when six million refugees and defeated soldiers flocked from Korea, China and Taiwan. But they were all Japanese, and Japanese-only is still the immigration policy. Today there are few Japanese living abroad, and they don't want to take their chances in depressed Japan. There are always, of course, desperate people with nowhere else to go. In 2000 Britain took in 10,185 refugees, the USA 24,000, Germany 11,446 - and Japan, 22. Five of these, Afghans, await deportation on the grounds they now face no persecution at home. Another major trend of our time, immigration from poor, overcrowded to rich, baby-short countries, is passing Japan by.