1. 1) Ministry of the Environment(2015):http://www.env.go.jp/earth/cop/cop21/
2. 2) NHK-Close up Gendai(2015):http://www.nhk.or.jp/gendai/articles/3725/
3. 3) Japan Pulp Mold Industry Association:http://www.pulpmold.gr.jp/
4. 4) Nonaka H.,Abera T.: Kagaku Kogyo Dec 36-41(2016)
5. 5) Daicel Polymer, Ltd. Celblen: http://www.daicelpolymer.com/ja/resin/line_up/