Keiwa, Inc. engages in the manufacture and sale of processed paper products and films. Its operations are carried out through the Optical Sheets and Functional Products segments. The Optical Sheets segment provides light diffusing films for flat panel displays. The Functional Products segment offers industrial packaging materials, industrial processing papers, clean energy materials, and other industrial materials, such as construction and agricultural materials. The company was founded by Osamura Hidetaro on September 28, 1948 and is headquartered in Tokyo, Japan.