Hi, I think I've posted on my question on the wrong section the first time.

I'm holding a Canadian passport with a long-stay Japanese working visa and planning to visit Hong Kong and Shanghai. I've read from the official website that I need a round-trip plane ticket in order to apply for the visa. All I have now is the round-trip plane ticket for Tokyo and Hong Kong because I'll be purchasing the plane ticket to Shanghai together with my friends in Hong Kong. Will I be able to apply for the visa?
Thank you in advance for answering my question.