When you get the LMO, I would recommend you to apply the visa at the port of entry (at the airport) instead of applying at Canadian embassy in Japan.
You can get the visa much faster and easier this way.
Plus, the process in the Canadian embassy in Japan is so tough.
When they find something, they ask you to send more information, and you can never ever know how long it is going to take to process.
So, that’s my advice to you.
Good luck!