What a thoughtful friend! He/she gave you koshihikari (a premium short grain rice) from Uonuma, a city in the Niigata Prefecture that’s famous for producing this rice. Koshihikari roughly translates to the “light of Koshi,” Koshi being an ancient province. I’ve never cooked it myself, but there are general cooking instructions at the bottom of this page: Short Grain Sushi Koshihikari Rice - Hinode Rice
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