The name of the sushi place in Banff where he worked as a chef was Suginoya. It is permanently closed unfortunately, as of about 2011 I believe. I have tried looking for other staff to see if they may be able to contact him, but have't had much luck.
It's a bit of a stretch I suppose, but perhaps someone on here worked there at somepoint or knows someone who worked there? I believe all or most of the staff spoke relatively fluent Japanese, though not all were Japanese.