>>54478784It's called a reference and its been done since genwun with even the most obscure stuff you dumbfuck.
This shit isnt even mutually exclusive to japan anyway. Mythology and fairytales around the world has been shoved into vidya created by most game developers in whatever country they originated from. Same goes for movies and TV shows.
But hey lets just complain about the minor case of the story of Momotaro getting some spotlight for people who dont know of it instead of recycling the same overused bullshit of Greek, Nordic, or whatever mythos.