Steps
1. Rinse the azuki beans and soak them in water overnight.
2. Drain the beans, place them in a pot with fresh water, and boil until tender (about 30 minutes).
3. In another pot, dissolve agar-agar in 200ml of water and bring to a boil.
4. Add sugar and a pinch of salt to the agar mixture, stirring until dissolved.
5. Once the beans are cooked, drain them and add them to the agar mixture, stirring well.
6. Pour the mixture into a mold and let it cool at room temperature before refrigerating for at least 2 hours.
7. Once set, slice the Mizu Yōkan and serve chilled.