A design pattern generation method of an embodiment is a method for generating a design pattern of a template. The design pattern generation method includes: generating an actual pattern including a first pattern protruding from a contact surface of the template with a material layer and extending in a predetermined direction along the contact surface, and a second pattern further protruding from an upper surface of the first pattern; calculating a volume of the first pattern and the second pattern per unit area on the contact surface; and adding, when a difference in the volume of the first pattern and the second pattern per unit area between regions on the contact surface exceeds a specified value, a third pattern to a region where the volume of the first pattern and the second pattern per unit area is small.