For Prime members only, Amazon offers the
Nishiki Premium Medium Grain Rice 15-lb. Bag for $14.28. Add it to your cart via Subscribe & Save to drop the price to
$13.57 at final checkout. With
free shipping, that's about a buck under what you'd pay in-store locally, although we saw it for a few cents less in December. It purports to be perfect for sushi.
Note: Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.