Ever since China introduced paper manufacturing into Japan in 7th century, people have been conveniently using paper in various aspects of life. We have a broad range of paper such as paper to draw on or to write on, wrapping paper or cardboard boxes to wrap in, toilet paper or tissues, etc. Virgin pulp, waste paper pulp, remaining wood of lumber sawing (wood mainly twisted or rotten in heart), plant material, man-made wood (lumber from thinning or mushroom tree such as eucalyptus or acacia, systematically planted abroad for making paper) could be the material as wood chip. Used wood such as demolished house scraps could also be the material. As a whole, paper manufacturing is good at recycling.