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By Taiga Uranaka
TOKYO, Feb 5 (Reuters) - Japanese stocks fell on Tuesday with Olympus Corp <7733.T> heading for its biggest one-day loss in six years on a weak outlook, helping sour market sentiment.
Yahoo Japan Corp <4689.T> jumped for a second day following Microsoft Corp's <MSFT.O> $44.6 billion bid for Yahoo Inc <YHOO.O>.
Market participants said the fall was mostly a reaction to the previous day's gains and to losses on Wall Street, pointing to a lack of factors to power a sustained rise.
"There is strong downward momentum in the market. It will take a huge amount of energy to reverse that," said Hiroshi Arano, an adviser at Mizuho Asset Management.
"The market is likely to hover around the bottom for the next few months unless some totally unexpected news comes, something that shows foreign investors that it's too early to write off Japanese companies," he said.
The benchmark Nikkei average <
> ended the morning session down 1.2 percent at 13,688.01. The broader TOPIX index < > lost 1.1 percent to 1,349.63.Amid mounting concerns over the economic outlook, companies with poor results or forecasts were roundly punished by investors.
Olympus fell 13.9 percent to 3,100 yen, the biggest individual drag on the Nikkei average, after the digital camera maker said on Monday it had revised down its profit outlook for the year by 4 percent on a strong yen and falling camera prices.
Alpine Electronics Inc <6816.T> fell 18.6 percent to 1,310 yen after the maker of car stereos and navigation systems cut its outlook for the year to March, citing an expected slowdown in the U.S. car market and a stronger yen.
Mitsubishi Rayon Co Ltd <3404.T> slid 17.6 percent to 351 yen after the chemical firm cut its outlook for the full year to March 31 on a steep rise in raw materials costs and slowing demand for its products.
YAHOO! JAPAN
Yahoo Japan rose 5.3 percent to 48,450 yen. The shares were untraded on Monday due to a glut of buy orders and were bid up 9.5 percent, or the stock's daily limit of 4,000 yen.
In contrast, Softbank Corp <9984.T> fell 4.1 percent to 2,115 yen after jumping 15.8 percent in the previous session.
Yahoo Japan is owned 41 percent by Softbank and 33 percent by Yahoo Inc, while Softbank holds a 3.9 percent stake in Yahoo Inc.
For Microsoft's bid for Yahoo Inc, the search giant Google Inc <GOOG.O> has emerged as a potential Yahoo partner against the operating software titan.
Mitsubishi UFJ Financial Group <8306.T> and other Japanese bank shares declined after brokerages downgraded U.S. banks and credit card companies, fuelling recession fears.
Top bank Mitsubishi UFJ shed 2.5 percent to 1,008 yen and No.2 Mizuho Financial Group <8411.T> fell 2.6 percent to 482,000 yen.
Sumitomo Mitsui Financial Group <8316.T>, the third-biggest bank, lost 1.4 percent to 829,000 yen.
Trade was moderate on the Tokyo exchange's first section, with 950.3 million shares changing hands, compared with last week's morning average of 976.2 million.
Declining stocks outnumbered advancing ones by a ratio of more than two to one. (Editing by Michael Watson)