The Consumer Agency discussed the term of description of food function at the meeting on December 20, 2013.
http://www.caa.go.jp/foods/index19.html
http://www.caa.go.jp/foods/pdf/siryo_2_1.pdf
To the issue, the Japan Federation of Bar Associations made recommendation regarding to the advertisement of health food as follows;
http://www.nichibenren.or.jp/activity/document/opinion/year/2013/131122_2.html