Abstract: A golf ball includes: a land portion; and a plurality of dimples each provided to be recessed with respect to the land portion. Each of the dimples has a dimple edge and a dimple plane surrounded by the dimple edge. The dimples include a plurality of eccentric dimples each having a deepest portion that is not located on a line connecting a center point of the dimple plane of a corresponding one of the eccentric dimples and a center point of the golf ball. The eccentric dimples have respective dimple axes that are oriented randomly in the golf ball, and each of the dimple axes is obtained in a plan view of the corresponding one of the eccentric dimples by connecting the center point of the dimple plane and the deepest portion of the corresponding one of the eccentric dimples.

Abstract: A golf ball includes: a land portion; and a plurality of dimples each provided to be recessed with respect to the land portion. Each of the dimples has a dimple edge and a dimple plane surrounded by the dimple edge. The dimples include a plurality of eccentric dimples each having a deepest portion that is not located on a line connecting a center point of the dimple plane of a corresponding one of the eccentric dimples and a center point of the golf ball. The eccentric dimples have respective dimple axes that are oriented randomly in the golf ball, and each of the dimple axes is obtained in a plan view of the corresponding one of the eccentric dimples by connecting the center point of the dimple plane and the deepest portion of the corresponding one of the eccentric dimples.

Abstract: An information processor performs processing of: creating a simulation model using a link model including a plurality of links connected to each other and, on a sole, elastic elements deformable perpendicularly to the sole, based on a weight of a user and measurement information obtained by measuring motions of a body of the user at a plurality of measurement points during predetermined movement of the user; executing a simulation that applies a parameter to the simulation model and obtains, as a simulation result, data representing motions of the link model, with the parameters set to a plurality of values; and determining at least one parameter of the sole most suitable for the user out of the plurality of values based on the simulation result obtained in the executing the simulation.

Abstract: A golf ball includes a land portion, and a plurality of dimples configured to be recessed from the land portion. Each of the plurality of dimples includes a circular bottom face, a circular opening configured to have a larger diameter than the bottom face, and a side face configured to connect the bottom face and the opening. The side face is configured to be linearly inclined so that the diameter of each of the plurality of dimples increases from the bottom face toward the opening. The diameter of the bottom face is 0.45 mm or more and 0.60 mm or less.