Yes I think it is
With 3 tori, 4 rice fields, monk, advisor and naishi you can get 89 which is the closest I could get.
Lowest is all mountain and one tori. I'm not sure you can end the game that fast but if u use imperial decree and keep retrieving one token you can waste turns. You can also use senthials (idk how it's spelt) next to each other to keep your score at -10.
I confirm the highest is 96 and lowest -10
There can be multiple setups with 96, but all involve the Ronin + perfect placements and combos of each card
There's a game in BGA with a tie at 96 for both players