Looks like another round of Jetstar sales to Japan. Winter is a nice season in Japan especially for snow lovers.
Cairns to Osaka- $119 One way (17 Jan to 28 Mar 2012)
Cairns to Tokyo - $199 One way (17 Jan to 28 Mar 2012)
Gold coast to Osaka/Tokyo - $219 On Way (14 Jan to 28 Mar 2012)
Sydney to Osaka/Tokyo- $318 One Way (1 Feb to 28 Mar 2012)
Melbourne to Osaka/Tokyo- $331 One way (14 Feb to 28 Mar 2012)
Update: Prices are actually cheaper then listed above (ie, Melb to Tokyo from $580 return) AND the dates for Melbourne actually include all of Feb from what I can see.
$199 Darwin to Tokyo
$171 Tokyo to Darwin