Uni to Ikura Donburi

Rinse Japanese short-grain rice thoroughly under cold running water until the water runs clear. Drain well in a sieve.

Combine the rinsed Japanese short-grain rice and Water in a rice cooker. Cook according to the manufacturer's instructions until the rice is fully cooked.

While the Japanese short-grain rice is cooking, prepare the sushi vinegar: In a small saucepan, combine Rice vinegar, Sugar, and Salt. Heat gently over low heat, stirring constantly until the Sugar and Salt are completely dissolved. Do not boil. Remove from heat and let the sushi vinegar cool to room temperature.