This paper proposes a Choshi design system. Choshi is a new method for carving of paper, which is uneven 3D shape and unique colors of papers. Choshi, derived from carving overlaid colored papers, has the following three features: 1Each layer consists of a single piece of paper of one color.2The color must be selected from a number of existing colors.3Choshi has an overlaid structure where carved papers are overlaid on other carved papers. The goal of the proposed Choshi design system has two issues: to enable a wider variety of people to easily and successfully create Choshi art, and to reduce the difficulty and tedium, of creating a Choshi art piece.