Ours was not sealed. Does it reads SEALED on the outside? How you plan to submit it? I mean sometimes [rare] they ask you to submit but mostly they need ORIGINAL PCC
May read this thread for more info;- https://www.canadavisa.com/canada-i.../sealed-police-certificate-from-japan.478999/
Amazingly there various opinions; as one member wrote;- "Please don't open the Japanese PCC, it becomes invalid. That's what the immigration officer at the Japan Embassy told me. I sent it by mail and I ordered for GCMS to confirm if the CIC received the PCC. As per the GCMS, it was uploaded in my file. Just FYI. "