If the recipient of the transfer wants to receive in her bank account in Japan, then TransferWise is currently the cheapest provider with 11.71 CAD for the transfer fees and a competitive CAD-JPY conversion rate (their current exchange rate is 1 CAD = 83.7561 JPY).
In comparison, you would pay a total cost of 43.76 CAD (roughly 4x as much) if you wanted to use RemitBee for the very same transfer.
Two other options for your transfer to Japan could also be good alternatives to TransferWise: Xendpay and OFX.