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J.Health Sci., 56(5), 488-501, 2010

-Review-

A Review of Indoor Air Pollution and Health Problems from the Viewpoint of Environmental Hygiene: Focusing on the Studies of Indoor Air Environment in Japan Compared to Those of Foreign Countries

Koichi Harada,*, a Asako Hasegawa,b Chan-Nian Wei,c Keiko Minamoto,c Yukari Noguchi,d Kunio Hara,e Osamu Matsushita,f Kosuke Noda,g and Atsushi Uedac

aDepartment of Biomedical Laboratory Sciences, Faculty of Life Sciences, Kumamoto University, 4-24-1 Kuhonji, Kumamoto 862-0976, Japan, bGraduate School of Science and Technology, Kumamoto University, 39-1 Kurokami 2-chome, Kumamoto 860-8555, Japan, cDepartment of Prevention and Environmental Medicine, Faculty of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan, dDepartment of Health Sciences, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashiku, Fukuoka 812-8582, Japan, eFaculty of Regional Health Therapy, Teikyo Heisei University, 4-1 Uruidominami, Ichihara 290-0193, Japan, fDepartment of Public Policy, Graduate School of Law, Kumamoto University, 40-1 Kurokami 2-chome, Kumamoto 860-8555, Japan and gInnovation Promotion Office, Kumamoto Software Co. Ltd., 2081 Taharu, Mashiki-cho, Kamimashiki-gun, Kumamoto 861-2202, Japan

Excessive indoor air pollution can cause sick building syndrome (SBS), cases of which still occur in Japanese homes despite strict regulations on the value of indoor chemical substances established by the Ministry of Health Labour and Welfare. Idiopathic environmental intolerance (IEI), so-called multi-chemical sensitivity (MCS) has become another issue because it is caused by an extreme low concentration of chemical substances. These problems are discussed from the viewpoint of environmental hygiene in the present study. First, indoor air quality and its adverse effect on health is reviewed according to the history of sick buildings. Next, the factors concerning indoor air quality are indicated, and then measures to combat these problems are considered to improve the indoor environment. No ideal solution has been found: however, we summarize important knowledge on research to regain patient health as a result SBS and MCS.