Wash the rice and drain. Place it in the rice cooker and add water up to the 1-cup mark.

Add the barley and twice its weight in water (100g or 1/2 cup in this case). Mix gently and let it soak for at least 30 minutes.

Remove 1 tbsp of water from the rice cooker, then add sake and mix. Start the rice cooker and cook as usual.

Once cooked, fluff the rice from the bottom to mix evenly.

For the topping, place a serving of cooked barley rice in a bowl. Top with diced avocado and drained canned tuna.