There are 18 direct and indirect flights connecting Sydney and Tokyo every week, with the journey taking 23 hrs 20 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, Singapore Airlines & 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.