The need for a VPN to watch Full House on Netflix arises primarily due to the show's licensing and distribution rights. Full House isn't accessible in the US Netflix library, and to watch it, you'll have to appear as though you're in a location where the show is available. In this case, that location is Japan.

Episodes of Full House are available for purchase on Prime Video forR$1.99 each. There's also an option to buy full seasons of Full House forR$19.99 each.