No, you are departing from Vancouver to transit at Narita Airport in Japan. As long as you have a valid Canadian visa or Canadian residence permit in your passport, and your Japanese visa is still valid, normally you do not need to apply for an additional Japanese visa. During the transfer process, you need to follow the instructions to exit from Terminal 3, and then enter Terminal 1 to complete transfer procedures. Please be sure to check all visa and travel requirements before traveling to ensure a smooth transfer.