There are 54 flights connecting Sydney and Tokyo every week, with the journey taking 19 hrs 50 mins on average.
Or, if you're fairly flexible on dates, try to get a last minute-deal by regularly checking the Netflights website.
In Tokyo, New Tokyo International Airport (NRT) is usually the cheapest airport to fly to, but there are one airports to choose from. Not sure who to fly with? Cathay Pacific, Korean Air and Malaysia Airlines are the most popular airlines available from Sydney.
If you can’t find flights that suit you, consider flying to a another part of Japan.