Originally Posted by
mkjr
Wait a second. If OP is Canadian and going to Japan from Canada, there is no outbound passport control. As long as op has Canadian passports for them and pax, I don't even think airline staff will say anything and frankly, it's not their business.
Canada doesn't have physical outbound passport control at all regardless of citizenship. Departures by air are recorded by passenger manifests and API data.
You're more likely to be asked a question by the Customs officer rather than the Immigration Inspector. During my last transit at NRT, I went landside since there was no line at immigration. The immigration inspector didn't ask a single question and only said "90 days" and pointed to the passport sticker. The customs officer in the green channel asked more questions like "What do you plan to do in Japan, Where are you staying, etc..."