Hi, I also live in Japan and am applying for PR.
What kind of work experience are you talking about? I think there are some temporary contract jobs (ie.
haken) that cannot be classified, but in general you should be able to list all your work experience in the background information forms.
Here's the information in the CIC website about all immigration categories:
http://www.cic.gc.ca/english/immigrate/index.aspPerhaps if you don't qualify as a skilled worker, you can check the provincial nominees programs.
Also, I've seen this list of "qualifying occupations", however I'm not sure to what extent it's being applied:
http://www.canadavisa.com/new-instructions-federal-skilled-worker-applications.htmlLastly, here's a contact list of the Canadian Consulate in Tokyo where you may ask your questions:
http://www.international.gc.ca/missions/japan-japon/visas/contact-visas-contactez-eng.aspHope that helps!
matane!