Japan's economy, the world's third-largest, has been stagnant for years In Japan, houses are like cars. As soon as you move in, your new home is worth less than what you paid for it and after you've finished paying off your mortgage in 40 years, it is worth almost nothing. It bewildered me when I first moved here as a correspondent for the BBC - 10 years on, as I prepared to leave, it was still th