Upper, shoe, and method of producing upper

A production method of producing an upper to be used for a shoe, the production method comprising:

• two-dimensionally developing three-dimensional shape data of a shoe last and creating a cutting pattern of a main body portion of the upper which is seamless and is in a shape having an inner periphery on an inner side of an outer periphery;
• cutting a sheet into the main body portion based on the cutting pattern;
• and
• covering the shoe last with the cut-out main body portion and at least one of expanding or shrinking the main body portion in conformity with a shape of the shoe last, wherein
• the creating a cutting pattern includes
• generating a two-dimensional pattern of the main body portion, such that a portion corresponding to a topline of the shoe last is set as an inner periphery of the main body portion and a portion corresponding to a surface of the shoe last is virtually cut into a plurality of radially arranged strips,
• adjusting a length of each gap provided between adjacent strips in the two-dimensional pattern such that at least one of an expanded or shrunk shape conforms to the shape of the shoe last, and
• setting the outer periphery of the two-dimensional pattern including each adjusted gap as the outer periphery of the cutting pattern.