Under $500 to Japan, if you're prepared to take a stopover and carry-on!
https://flightscout.co/au/cheap-flights/melbourne-australia-…
Example: 03 Mar to 18 Mar = $494 Return!
Airline: Cebu Pacific
Stopover: Manila
It's not in style, but it is cheap…
Malaysia Airlines is fantastic. They had some bad luck with MH370 (pilot?) and MH17 (someone else shot them down!), but I've had a couple of flights with them since, half empty, great service and food.