Soak dried adzuki bean in water for 2 hours.

2 hours later, drain the beans. Put a lot of water and the beans in a pot and bring it to a boil without a lid on.

Drain the beans again, and put them back in a pot and add a lot of water. Bring it to a boil, turn the heat low and simmer for about 80 - 90 minutes with a lid slightly open. Occasionally give it a good stir and add some water as the water will get vaporized by heat.

To check if the beans get soft enough, take out a bean from the pot, drop it in water in a glass to make it cool, then eat to check. If the bean’s skin is soft enough, drain the beans.

Put back the beans in the empty pot, add a half amount of sugar and salt. Turn hear on, give it a good stir on low heat, then add another half of the sugar. Turn the heat to medium and c keep stirring for 8 minutes.

Place the bean paste on a stainless cooking vat flat, and leave it aside to make it cool down.