Ministry of Health, Labour and Welfare conducts the national nutrition survey every year. According to the survey, iron intake is decreasing rapidly. The data below shows the trend in iron intake per day per capita, 1975 to 2012, in Japan.
Figure : Trend in iron intake per day per capita, 1975 to 2012, in Japan
| Year | Iron (mg) |
| 1975 | 13.4 |
| 1980 | 13.1 |
| 1985 | 10.8 |
| 1990 | 11.1 |
| 1995 | 11.8 |
| 2000 | 11.3 |
| 2001 | 8.2 |
| 2002 | 8.1 |
| 2003 | 8.1 |
| 2004 | 7.8 |
| 2005 | 8.0 |
| 2006 | 7.9 |
| 2007 | 7.8 |
| 2008 | 7.7 |
| 2009 | 7.8 |
| 2010 | 7.4 |
| 2011 | 7.5 |
| 2012 | 7.4 |
Professor Chizuko Maruyama of Japan Women's University says people are not eating "green and yellow vegetables", "leafy vegetables", and "seaweed" so much anymore, and it causes decreasing of iron intake (vegetable.alic.go.jp/yasaijoho/joho/1208/joho01.html).
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Intake data source is Ministry of Health, Labour and Welfare.
www.e-stat.go.jp/SG1/estat/GL08020103.do?_toGL08020103_&listID=000001118468&requestSender=estat
www.e-stat.go.jp/SG1/estat/GL08020103.do?_xlsDownload_&fileId=000006864461&releaseCount=1
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