Add the sushi rice and 350ml of water to a cooking pan and bring it to the boil. Let it cook for 10 minutes, and then turn off the heat. Don't take the lid of the pan for another 15 minutes.
Cook the broad beans for about 7 minutes in salted water. Make sure to directly drain the beans after the cooking process with cold water. Then take off the outer shell of the broad beans. You can do this to pulling on the left or right side and pushing the bean out of the shell.
Slice the herring and the onion in small cubes. Mix in a small bowl with ½ teaspoon horseradish, and let the mixture marinate.
Slice the radishes in thin slices and mix with a pinch of salt and 1 tbsp of rice vinegar.
Grate the carrot, and mix with sesame oil, sesame seeds, honey and 1 tbsp of rice vinegar.
Use a vegetable peeler to make long slices of cucumber.
And use scissors to cut the nori sheets in nice shapes like fishes.
When the rice is ready; add 1 tbsp of rice vinegar to the rice and mix it through.