To provide an elliptic or needle-like polymer particle capable of enhancing an optical characteristic such as light diffusability and light convergency, a frictional characteristic such as slidability, and the like, and having a high aspect ratio. 光拡散性および集光性等の光学特性、滑り性等の摩擦特性などの向上を図ることができる、高アスペクト比を有する楕円状または針状ポリマー粒子を提供すること。 - 特許庁