* Japan PM: radioactive levels near nuclear plant have risen * Drop in Japanese shares spooks financial markets
* Higher yielding currencies fall, dollar/yen steadies
* FOMC outcome may offer longer term support to dollar
(Changes dateline, adds quote, detail, previous TOKYO)
By Neal Armstrong
LONDON, March 15 (Reuters) - The yen rose against higher yielding currencies on Tuesday after Japan's prime minister said radiation levels near a quake-stricken nuclear plant had become high, prompting investors to reduce holding of riskier assets.
Trading was volatile, and the yen later trimmed some of its gains after a 100-pip drop versus the dollar spurred vague talk of yen-selling intervention by Japanese authorities.
Another plunge in Japanese stocks <
>, closing with losses of over 10 percent on the day following Monday's six percent fall, triggered deleveraging in global stocks <.MIWD00000PUS>Expectations that Japanese insurers and companies will repatriate funds to help pay claims and reconstruction costs in the wake of northeastern Japan's devastating earthquake had pushed the yen to a high of 80.60 per dollar on Monday, not far from its record high of 79.75 struck in 1995.
It was last trading at 81.54, down around 0.1 percent on the day. <JPY=>
"Foreign investors are heavily invested in Japanese stocks and for the moment that's leading to yen outflows which is helping to compensate for the expectation of yen repatriation," said Manuel Oliveri, currency strategist at UBS in Zurich.
Finance Minister Yoshihiko Noda said he was monitoring moves in the yen but declined to comment on whether Tokyo had intervened in currency markets. A senior Japanese government official said speculation was behind sharp movements in the foreign exchange and stock markets. [
]Japanese stocks plunged after the nuclear power plant exploded and sent low levels of radiation floating towards Tokyo, prompting some people to flee the capital and others to stock up on essential supplies.
Prime Minister Naoto Kan urged people within 30 km (18 miles) of the facility north of Tokyo to remain indoors and conserve power amid the world's most serious nuclear disaster since the Chernobyl catastrophe in Ukraine in 1986. [
]Speculation is rising that Japan could intervene to stem the yen's gains as it could hurt the country's manufacturers, some of which are already smarting from damage from the disaster.
The yen was broadly higher against currencies perceived as higher risk, with the Australian dollar down 1.9 percent at 80.77 yen <AUDJPY=R> and the Canadian dollar down 0.9 percent at 83.05 yen <CADJPY=R>. The euro fell 0.5 percent to 113.58 yen <EURJPY=R>. Traders highlighted Ichimoku cloud support at 111.34.
FEDERAL RESERVE MEETS
One event that could lend some support to the dollar against the yen over the longer term is a U.S. Federal Reserve policy meeting coming up later on Tuesday.
The Bank of Japan is even more dovish than the Fed, which has been cautious about seeking to exit its stimulus policy as it wants to bring down unemployment.
"Today's FOMC will perhaps make the difference between the Fed and the BOJ clearer. That could help the dollar/yen in the longer term," said Teppei Ino, analyst at the Bank of Tokyo-Mitsubishi UFJ.
The Bank of Japan said on Monday that it would increase the size of its asset purchase to 10 trillion yen ($122 billion) from 5 trillion yen and analysts think it may take more steps if the economic outlook deteriorates further.
Implied volatilities in dollar/yen were still rising, with the one-month <JPY1MO=> around 12.75 percent compared to 9 percent before the earthquake hit. Volatilities were still low compared to levels above 30 percent seen around the peak of the global financial crisis in 2008.
The dollar index, which measures its value against a basket of currencies, climbed 0.4 percent to 76.634 <.DXY>, pulling away from a four-month low of 76.124 hit last week.
The dollar, which investors tend to flock to in times of financial market stress, also rose against the Australian dollar, which slid below its 100-day moving average, down 1.7 percent at $0.9918 <AUD=D4>., a six-week low.
The euro fell 0.4 percent $1.3935 <EUR=>, holding below a four-month high around $1.4036 earlier this month, supported by market expectations the European Central Bank will raise interest rates soon to keep inflation in check.
(Additional reporting by Hideyuki Sano and Masayuki Kitano, editing by John Stonestreet)