Manjū is a type of Japanese dessert that is round and soft like a little pillow. It's made from dough that's mostly made of wheat flour, which is kind of like what your mom uses to make bread, but with a few extra special ingredients in it to make it taste yummy.
Inside the manjū, there is usually a sweet filling, like red bean paste, which is a smooth and creamy mixture of mashed up beans and sugar. Some manjūs also have other fillings like chocolate, fruit, or mochi, which is a chewy rice cake.
To make manjū, bakers mix together the dough ingredients, roll it out flat, shape it into little cups, and fill them with the sweet filling. Then they pinch the ends together so the filling stays inside, and steam the manjū for a little while to make it soft and fluffy.
Manjū is a popular dessert in Japan, it's eaten as a snack or after meals. You can find it in stores and bakeries, or even make it yourself at home if you have the ingredients and the right recipe.