(Refiles to add bullets)
* Hang Seng up 0.07 pct on day, down 6 pct for week
* Shanghai falls 0.9 pct for the week, up 0.3 pct Friday
* Japan crisis keeps investors cautious
By Yixin Chen and Clement Tan
HONG KONG/SHANGHAI, March 18 (Reuters) - Hong Kong and China stocks closed marginally higher in thin Friday trade, as investors continued to worry about Japan and largely shrugged off a global move to help Tokyo restrain a soaring yen.
The benchmark Hang Seng Index ended up 0.07 percent at 22,300.23 points, but 6 percent lower on the week, with China property issues leading gainers.
China's main stock index, the Shanghai Composite closed up 0.3 percent at 2,906.9 points on Friday after a 1.1 percent fall on Thursday. For the week, that index fell 0.9 percent.
Early Friday by Asian time, the Group of Seven rich nations announced joint intervention to keep the yen from being too strong. That helped the Nikkei gain 2.7 percent. But the Hang Seng's highest point Friday was only 0.75 up, and in the afternoon shares slipped as concern remained about Japan's nuclear crisis in the wake of the March 11 earthquake and tsunami.
PROPERTY COUNTERS LEAD HK GAINS
In Hong Kong, China Overseas Land & Investment Ltd , the country's largest developer by market value, climbed 6.5 percent, nearing a five-week high after announcing a strong net profit for the second half of 2010 and unveiling a plan to increase spending despite property tightening measures in China.
Analysts said its strong earnings report gave fresh trading impetus after two recent blows, from Hong Kong banks beginning to raise mortgage rates and the Japan's earthquake.
Other property counters also rose, including China Resources Land Ltd , up 6.46 percent, and Henderson Land Development Co Ltd , up 4.06 percent after 2010 net profit rose to HK$15.82 billion from HK$15.47 billion.
But the Hang Seng Index failed to break its 200-day moving average of about 22,300 for a second consecutive day after briefly trading above that level at midday.
Traders said a closing above this level and good trading volume are needed to encourage buyers to return to the market. But they expect the benchmark to hover between 22,000 and 22,800 until the Japan nuclear situation stablises.
DOMESTIC CONCERNS CURTAIL SHANGHAI GAINS
Turnover fell to its lowest level on the Shanghai Composite Index since Feb. 14 as investors remained wary of bold moves.
Analysts said the most important influence on the index remains China's next step on tightening monetary policy. Japan's crisis sparked worries in some sectors but would not change the index's trend in the longer term, they said.
"Overall, there are uncertainties and speculation in the market, not only about domestic monetary policy but the global situation," said Wen Lijun, an analyst at Nanjing Securities. "That makes investors very cautious."
Salt producers, the biggest gainer on Thursday, underperformed after Chinese authorities told shoppers to stop panic buying of salt, which began after baseless rumours that the iodine in it can stop radiation sickness.
Yunnan Salt & Chemical Industry Co tumbled 7.6 percent after jumping by the 10 percent daily limit on Thursday, while Inner Mongolia Lantai Industrial on Friday dropped its 10 percent daily limit. (Editing by Richard Borsuk)