Doing a working season in Hakuba - Advice on Travel Insurance that covers Off-Piste

Title pretty much sums it up but the finer details would be that I’m doing a working holiday in Hakuba and will be doing some backcountry/off-piste riding as well.

Anyone had any experiences with companies that cover for off-piste snowboarding and the usual cover for a working holiday as well? With the backcountry always unpredictable, want to cover myself in the event of something bad happening.

I’ve done a little bit of research but can’t seem to find a straight answer.

Any recommendations are appreciated

Thanks crew!