Make the sushi vinegar. Refer to Recipe ID: 1725198.
Rinse the rice 30 minutes before you plan to cook it and drain it in a sieve. Put the rice in the rice cooker, add water up to to the appropriate line, put in the konbu seaweed and switch on.
When the rice is cooked, take it out into a handai (sushi tub). Add the sushi vinegar, and mix while fanning the rice grains.
You can make 4 futomaki (fat sushi rolls). For each futomaki you will need 250 g of rice; for a mid-sized sushi roll you'll need about 150 g of rice.
Story Behind this Recipe
This recipe was handed down to me by my mother. If you make sushi vinegar to stock, as long as the sugar and salt have dissolved there's no need to let it rest for a day. If making the sushi vinegar on the spot for one batch of sushi rice (3 rice cooker cups' worth) you need 80 ml of rice vinegar, 2 to 3 tablespoons of sugar and 1 teaspoon of salt. The rice should be just the right sweetness. Microwave the sushi vinegar to dissolve the sugar and salt (about 20 seconds).
Step 1: Cook the rice so that it's on the firm side. Step 3: Use the rice after it's cooled down a bit. If cooking 2 rice cooker cups, use 7 cm of konbu seaweed and 50 to 60 ml of sushi vinegar. While you should drain off the rice in a sieve before cooking it, it will still taste good if you just cook it right after rinsing it. It's fine to omit the kombu.