This is freeze-dried miso soup. Since it is a powdered freeze-dried miso, you can simply pour it into a bowl and it will dissolve immediately when you pour in hot water, spreading the rich aroma of the miso and dashi. 
Nagatanien's "Freeze-Dried Asage 8 Bags" is a powdered instant miso soup based on a blend of two types of rice miso, with the addition of wakame seaweed, fu (wheat gluten), and dried green onions. The freeze-drying process allows the rich aroma of the miso and dashi to dissolve quickly in hot water, allowing you to easily enjoy authentic-tasting miso soup in a variety of situations, such as busy mornings, bento lunches, and when traveling.

Product specifications for Nagatanien freeze-dried asa-age (8 bags) [instant miso soup]