(Repeats to widen distribution)
* Party vote in Tokyo is focus of yen, Japan stocks
* US retail sales due later could determine risk rally's fate
* Third time a charm for S&P 500's 200-day moving average?
By Kevin Plumberg
HONG KONG, Sept 14 (Reuters) - The yen rose to a 15-year high on Tuesday ahead of a decisive vote in Japan, weighing on the country's equities and leaving unclear whether a rally that has lifted global stock markets to the highest in a month can last.
The yen has for the last few years been an accurate gauge of investors' distaste for risk-taking. http://r.reuters.com/zuz33p
Japan's ruling party was holding a leadership election on Tuesday that will determine who is Japan's prime minister, which could have a big impact on how Tokyo deals with persistent yen strength and deflation.
Investors have had mixed signals about whether it is safe to shift out of havens and buy back riskier, higher-yielding assets.
Resilient economic growth out of China and relief that new banking regulations will not unleash a rush to raise equity have gently turned the attention of investors away from uncertainty about the U.S. recovery.
August U.S. retail sales due later could be a reminder though of how much the economy is slowing.
"Although better data in the U.S. and China and the agreement in Basel on new regulations have boosted risk appetite, the moves are already beginning to look exhausted," Mitul Kotecha, global head of foreign exchange strategy at Credit Agricole CIB, said in a note.
"It would be easy to jump on the bandwagon but after the sharp gains registered over recent days we would suggest taking a cautious stance about jumping into risk trades at current levels."
The U.S. dollar was down 0.4 percent to 83.35 yen <JPY=> after earlier falling as low as 83.23 yen is busy trade.
TOO CLOSE TO CALL
The race between Prime Minister Naoto Kan and party heavyweight Ichiro Ozawa was too close to call, Japanese media surveys showed, ahead of a party conference due to start at 0500 GMT. Analysts generally agree an Ozawa victory could cause the yen to weaken, since he is more open to government intervention to stop the currency's 11 percent climb this year. http://r.reuters.com/myv63g
The U.S. dollar index <.DXY>, a measure against six other major currencies, was flat on the day after falling by the most in two months on Monday as dealers scooped up euros and other higher yielding currencies.
Japan's Nikkei share average <
> led Asia's declining markets, falling 0.6 percent. The strong yen has been a lead weight on Japanese stocks, causing them to underperform other advanced markets."While opinion polls have favoured Kan, the stock market overwhelmingly would want to see Ozawa win because he is seen to be a more aggressive leader, including his view on currencies," said Kenichi Hirano, operating officer at Tachibana Securities in Tokyo.
The Nikkei has not risen above its 200-day moving average since early May. The U.S. S&P 500 index <.SPX> on the other hand has breached the key long-term indicator three times since May, including overnight. A third failure to stay above the 200-day moving average could trigger a bout of profit-taking.
The MSCI index of Asia Pacific stocks outside Japan was up 0.1 percent <.MIAPJ0000PUS>, lifted by the raw materials sector. The index is struggling to post a fourth straight session of gains, having fallen for only two days in September.
The index is trading at 11.7 times expected earnings a year from now, still way below the five-year average of 13.2 times, suggesting there are still more bargains out there, Thomson Reuters I/B/E/S data showed.
Oil was steady near a one-month high with the shutdown of the biggest Canada-U.S. pipeline entering a fifth day. U.S. crude for October <CLc1> declined 0.1 percent to $77.13, having earlier touched an intra-day peak at 78.04, the highest since Aug. 11. (Additional reporting by Aiko Hayashi in TOKYO; Editing by Alex Richardson)