* Problems outside U.S. provide support to dollar
* 10-year Japanese government bond yield falls to 4-mth low
* Toyota shares up 5.5 pct, outperforming Asia stocks (Adds European markets, updates prices throughout)
By Kevin Plumberg
HONG KONG, Aug 8 (Reuters) - The U.S. dollar rose sharply on Friday, hitting a five-month high against the euro and weighing on metals prices as investors expected the malaise that has afflicted the U.S. economy would spread to other countries.
While the U.S. economy has not improved much by almost any measure, investors have begun to reassess other parts of the world, particularly after the European Central Bank president said the euro zone faces substantially weaker growth this year and a Japanese official warned the world's second-largest economy may be in a recession.
European stock markets opened lower, with Britain's FTSE 100 <
>, Germany's Dax < >, and France's CAC < > down between 0.3-0.5 percent in early trade."We are seeing a shift away from a focus on the U.S. to a more global problem," said Sharada Selvanathan, a currency strategist at BNP Paribas in Hong Kong. "The dollar is getting a boost by default."
The benchmark yield on the 10-year Japanese government bond, which moves in the opposite direction to the price, tumbled to a four-month low following an overnight rally in U.S. Treasuries, as investors scrambled to the relative safety of government debt.
This week the dollar has rallied more than 2 percent, as measured by an index of six major currencies on the ICE futures exchange <.DXY>, and has closed on a daily basis above its 200-day moving average -- a technical signal of a potential turnaround that has not happened since April 2006.
The euro was down 0.6 percent at $1.5225 <EUR=>, extending a decline that began overnight after comments from ECB President Jean-Claude Trichet suggested interest rates were on hold. Against the yen, the dollar rose 0.3 percent to 109.63 yen <JPY=>.
Usually the stronger dollar is seen as a boon for Asia because of its impact on exporters. However, this time might be different because of a general consumer spending crunch in developed economies oweing to soaring food and energy costs.
"The combination of a stronger dollar and a weak global consumption outlook spells trouble for Asian currencies and especially those with where exports have high leverage to developed economies demand," said Patrick Bennett, Asia foreign exchange and interest rates strategist with Societe Generale in Hong Kong.
METALS DENTED BY DOLLAR
Gold <XAU=> fell 0.5 percent to $866.40 an ounce as the dollar rallied and reduced the metal's appeal as an alternative investment. Bullion dropped 4.7 percent this week, the biggest decline since March 2008.
Copper futures traded in London and Shanghai also declined on the resurgent dollar and sneaking concerns about the world economy.
Japan's Nikkei share average <
> finished 0.3 percent higher. Toyota Motor Co <7203.T> stock jumped 5.5 percent after the world's biggest auto maker clung to its earnings forecasts despite a 28 percent fall in quarterly net profit.Outside Japan, Asia-Pacific stocks were down 0.5 percent <.MIAPJ0000PUS>, creeping back toward a 16-month low hit on Tuesday.
China's Shanghai composite index <
> dropped 3 percent in thin volume, led by the real estate and financial sectors. Shares of businesses associated with the Olympics in Beijing weakened as well as investors cashed in their bets.Such shares had surged in the run-up to the Olympics, which kicked off on Friday, on speculation that they would benefit from tourist traffic during the games, though analysts said the companies would gain little if any long-term benefit even if Olympics business were strong.
Equity strategists with JPMorgan have begun the tricky task of preparing for a recovery in Asia-Pacific markets sometime in the second half. They have advised clients to bet on markets where inflation is trending lower, such as China, Taiwan and Singapore, by switching to the financial and consumer discretionary sectors from the energy and materials sectors.
Oil's $25 decline in the last month has enhanced this view, they said.
"Although the rotation argument does not require lower commodity prices, declining prices add to the story through both lower inflation expectations encouraging the switch into domestic stocks and obviously lower commodity prices forcing investors out of commodity stocks," said Adrian Mowat, emerging Asia equity strategist with JPMorgan, in a note to clients.
In the bond market, the 10-year JGB yield fell to 1.47 percent <JP10YTN=JBTC>, the lowest in four months.
Short-term yields, which tend to most strongly reflect shifts in the outlook for monetary policy, declined as well, with the 2-year yield at a four-month low of 0.670 percent <JP2YTN=JBTC>.
U.S. crude oil futures were steady around $120 a barrel <CLc1> on Friday, recovering from three-month lows amid concerns a 1 million barrel per day pipeline that was attacked by Kurdish separatists in Turkey could remain shut for up to two weeks.