I've always joked around about Asians rinsing their rice: "The world would save so much fresh water if Asians only rinsed their water once." My mom would usually get mad at me since I usually rinse 1-2 times when she does around 4 rinses.

Then I asked a friend who worked at a fine dining sushi/sashimi place how much they wash their rice. Minimum 6 washes. I guess it's not much of a joke anymore.