* Euro retreats from 5-month high vs dlr, falls vs yen
* Dollar close to lowest since Sept. 15 intervention vs yen
* Dollar index just above 8-month low
* Aussie slips from 2-year high on profit-taking
By Charlotte Cooper and Masayuki Kitano
TOKYO, Sept 27 (Reuters) - The dollar edged up from five-month lows on Monday as the euro ran into profit-taking, and it dug in against the yen as intervention jitters lent support.
With the end of Japan's fiscal first half approaching, the dollar was expected by some to see selling pressure against the yen, although others said this could be countered by yen sales related to the launch of Japanese mutual funds on Monday.
"Since this is the week when the fiscal half-year comes to an end, I think there will be a decent amount of (dollar) selling," said a senior trader at a major Japanese bank.
"But because we are in such a situation, that also means that wariness toward intervention is strong."
He doubted the dollar would fall rapidly even if stop-loss sell orders near 84.00 yen were triggered, adding: "It's scary to sell the downside."
After spiking in Asian trade on Friday on rumours of further intervention, the dollar eventually lost all its gains by the end of the day and fell to its lowest since Japan launched yen-selling currency intervention on Sept. 15.
It also dropped to an eight-month low against a basket of currencies as speculation of more U.S. quantitative easing kept it under pressure.
There was no confirmation of whether Japan's authorities had intervened. Prime Minister Naoto Kan said in New York that he was unaware of any new market intervention.
On Monday, the dollar held steady at 84.30 yen <JPY=>, above Friday's low of 84.12 and more than a yen above the 15-year low of 82.87 hit shortly before Japanese authorities acted nearly two weeks ago to sell yen for the first time in six years.
A number of toushin, or Japanese mutual funds, are set to be launched this week and their selling of the yen could support the dollar, dealers said, although Monday's launches attracted a relatively small amount from retail investors. [
]EURO RALLY PAUSES
The dollar index <=USD><.DXY>, a measure of its performance against six major currencies, was little changed at 79.35 after dropping to its lowest in almost eight months on Friday at 79.25.
It fell through the 61.8 percent retracement of its rally from November to June on Friday, a bearish signal.
Traders said the euro was facing some profit-taking against the dollar after gaining 6 percent on the dollar this month and hitting its highest since April on Friday at $1.3496 <EUR=>.
It stood at $1.3468 on Monday and faced significant resistance at $1.3510, a 50 percent retracement of its fall from above $1.51 last November to its June low below $1.19. There was talk of a barrier at $1.3525 with stop-loss buy orders above that level.
Analysts said some caution on the euro might also be setting in ahead of European Central Bank tenders due to expire this week.
Banks are preparing to repay 225 billion euros ($303.5 billion) of 12-, six- and three-month funds to the ECB on Sept. 30. They have the option of rolling lending over into three-month and six-day operations.
"The last time this happened back in (late) June we had euro weakness going into the expiry and then a relief rally afterwards," said Gareth Berry, a currency strategist at UBS in Singapore.
"The key question is how much of that liquidity will come back into the system for another three months. If banks ask for less than they return to the ECB that should be euro positive as it's a sign that banks don't need as much as they had before."
The euro was little changed against the yen at around 113.50 yen <EURJPY=R>, after it hit its highest in nearly two months at 113.78 yen on Friday. It is up more than 6 percent against the yen so far this month.
Likewise the Aussie, which has been driven by expectations of higher interest rates and demand for Australian commodities, has risen more than 7 percent on the yen in September.
It reached its strongest levels in four months last week, above 81 yen <AUDJPY=R>. It stood at 80.68 yen on Monday, down 0.3 percent on the day.
The Australian dollar also succumbed to profit-taking and was down 0.2 percent at $0.9575 <AUD=D4>, although it hit a two-year high of $0.9623 earlier in the day. ($1=84.18 Yen; $1=.7413 Euro) (Additional reporting by Hideyuki Sano in Tokyo and FX analysts Rick Lloyd in Singapore and Krishna Kumar in Sydney; Editing by Michael Watson)