but i thought can buy n cook ourselves then put the vinegar to mix
here mix there
Erm... you have
to use the right type of rice, then cool it quickly, preferably in
a wooden container, then mix mirin and ... can't remember the name
of the other one, and use a wooden spatula and mix it in
quickly...
But that's for sushi rice. 
I remember when I made sushi a few years ago, I had the fan
turned on and directed at the rice to cool it down quickly. I
used the best ingredients I could find and whoa... I got really
lovely sushi! 
