There are two kinds of odor emission regulations, what is based on the standards of odor compounds concentrations and on that of the values by the assessment using human nose. The latter one is called "Odor Index regulation" in Japan, and it has advantages such as applicability to all sort of odor, whereas it needs extreme attentions to accuracy control and to safety management. In the year 2002, Odor Index regulation is being applied only to 30% of all odor-regulation designated areas in Japan. Ministry of the Environment Japan (JMOE) is now implementing wide variety of activities to promote Odor Index regulation. And the development of simplified measurement methods, accuracy management procedures, the correspondence to the globalization, etc. are currently ongoing. At the same time, JMOE is conducting the evaluation of deodorization techniques and the disclosure of these information to odor-emitting organizations, and moreover, is supporting the activities to create excellent "scent-environment".%悪臭の規制には，臭気物質濃度による規制と人間の嗅覚での評価に基づく規制がある．後者による我が国 の規制は臭気指数規制と呼ばれ，精度管理や安全面に配慮が必要であるものの，あらゆる物質のにおいに対 応できるなどの利点がある．臭気指数規制が導入されている地域は現在30％にとどまっているが，環境省 では，臭気指数規制の導入を推進するために様々な取組みを実施している．さらに，簡易測定法の開発や測 定精度確保の検討，国際化への対応などの活動も進行中である．同時に，脱臭技術の評価や事業者への脱臭 技術情報の提供，良好なかおり環境の創出を推進する取組みも行っている．
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