Tempura paper, also known as tenugui or oil blotting paper, is a thin and absorbent paper that is traditionally used in Japanese cuisine to absorb excess oil from fried foods. The paper is placed underneath the fried food, such as tempura, and helps to keep it crisp and dry by absorbing any excess oil. Tempura paper is also used to line bento boxes, helping to keep fried foods separate from other items in the box. It is a popular and essential item in Japanese cooking, especially for those who enjoy making and serving fried foods at home.