
Despite warnings from European leaders that Sunday's referendum was effectively an in-out poll on the euro, more than 60 percent of the voters heeded the government's call to vote "No".
In early trade Tokyo fell 1.61 percent, Seoul shed 1.00 percent, Sydney lost 1.56 percent and New Zealand was off 0.50 percent.
The euro was at $1.1024 and 135.11 yen compared with $1.1102 and 136.70 yen Friday.
However, it clawed back some of the losses suffered in New York electronic trade Sunday, when it fell at one point to $1.0987 and 134.91 yen. Dealers are now in a wait-and-see pattern as the creditors -- the ECB, the European Commission and the International Monetary Fund (IMF) -- plan their next move.
"There's a whole range of unpredictable outcomes," Mark Lister, head of private wealth research at Craigs Investment Partners in Wellington, told Bloomberg News.
"It's surprising that the 'No' vote won so convincingly, certainly more decisively than the polls had suggested. This puts us in limbo for so much longer and it's very negative for risk sentiment."
The government of Greek Prime Minister Alexis Tsipras had campaigned against accepting debt reform proposals from its creditors, claiming a "No" vote would strengthen his hand in negotiations.
German Chancellor Angela Merkel and French President Francois Hollande hastily called a European summit for Tuesday after stating the Greeks' decision must "be respected".
But Jeroen Dijsselbloem, leader of the Eurogroup of eurozone finance ministers, who had warned ahead of the poll that a "No" vote would likely lead to Greece exiting the single currency, termed the result "very regrettable".
And German Vice chancellor Sigmar Gabriel took an even dimmer view, saying Tsipras had "torn down the last bridges which Europe and Greece could have crossed to find a compromise".
He added that despite Tsipras' assertions, a fresh round of bailout talks now were "difficult to imagine".
Analysts warned the decision had likely put Athens on course to exit the eurozone.
Shinya Harui, currency analyst at Nomura Securities in Tokyo, said: "I personally think the chance (of the Greek exit) is very high, at around 70-80 percent.
"A Greek exit would shake confidence in what had been 19-nation solidarity, which could fuel anti-euro movements within Europe."
Gold fetched $1,173.37 compared with $1,168.43 late Thursday.