Working visa or working holiday visa

Hey I’m an Australian from Western Australia I am looking at doing a snow season in Hakuba and think I have a job lined up.

On a working holiday visa I am not allowed to work same place / region for over 3 months does this mean I need to get a work visa if I want to stay there for the whole season 4-5 month

Also applying for the WHV I have to be in my home state WA?
But the work visa is it different in anyway in regard to your location when applying?
I understand for a work visa I need to get a special letter from my employer.

Thanks any tips or knowledge from people that have worked this out already be much appreciated

by yogabbagabba4200