There has been some unreal deals this summer from Toronto to locations in Asia, including Japan. Well, this deal is back--fly United, Air Canada, and ANA, with 1 stopover in San Francisco on the flight out (Air Canada to San Fran, then United to Osaka), but 2 stopovers coming back, in Beijing and Chicago (eww) with ANA and United. It's available on selected dates from October to March. If you use Google flights, you can check the whole month.
Start with October 25 to November 15th here.