... Yen sales without U.S. backing would be a challenge, the officials said on condition of anonymity because the government discussions are private. Two of them also said volatility, rather than the current level, would be a more likely trigger for an end to the policy of refraining from sales of the currency, which last week hit a 15-year high against the dollar. Developed economies abroad are weaker than when Japan last intervened, and are themselves looking to boost exports, making it tougher for Japan to go it alone. ... http://noir.bloomberg.com/apps/news?pid=20601087&sid=as7dUwy.Fe4U&pos=1 Ha, ha, ha, ha !!!! Since when is Japan concerned about the economic development of the US and "others" ? What a bunch of cowards are sitting in the Japanese government ?