I'll be flying to Japan and I'm staying at a friend's house before my flight to save money on lodging. I already knew but completely forgot about the fact that she smokes cannabis and now I'm worried about the stench sticking to my suitcases and/or their contents. They don't seem to smell of anything yet but my puny human nose can't possibly compare to a trained dog's. She usually smokes 1 joint at night in a well ventilated room and I've only been staying with her for 3 days, if that matters at all.
Supposing that the suitcases did in fact catch the smell, will this be a problem when arriving at the airport in Japan? I've never smoked anything and it's not as if customs will find something in my suitcase, but I'm worried about any possible problems like wasting hours and hours at the airport while they turn my luggage upside down a dozen times.
Would I be better off renting in some other place before my flight to let the smell dissipate or is it one of those things that stays there for months?