What is Obesity?
Generally, it is said that obesity is a body condition in which weight is more than normality and body has excess fat. To be concrete, the value of BMI is over 30 is obesity. In the world, 24 percent of men and 27 percent of female are obesity. So, it becomes social issue. Obesity increases the likelihood of various disease. For example, diabetes, high blood pressure, cancer. Lack of exercise and eating high calorie are cited as the cause of it.
Obesity in the world
The research team of University of Washington had summarized the survey results or research results of 1,700 more than 188 countries, and published the survey about obesity in 2013. As a result, the proportion of overweight-obese adults in the world of 2013 turned out men 37%, women 38%. Obese population was the 885 million in 1980, but had increased to 2.1 billion in 2013. According to this fact, any countries couldn’t reduce the obese population for 33 years.
Following: the top 10 of the country has a lot of obesity.
(1)United States (86.9 million)
(2) China (62 million)
(3) India (40.4 million)
(4) Russia (29.2 million)
(5) Brazil (26.2 million)
(6) Mexico (24.9 million)
(7) Egypt (21.8 million) 
(8) Germany (17.1 million)
(9) Pakistan (16.7 million)
(10) Indonesia (15.1 million)
The trend in recent years, obesity in children and young people has been increasing. Measures are required worldwide to decrease obesity.
Japanese obesity
About 30% Japanese men and about 20% Japanese women were obese in 2011.
Men from 30 to 69 years old are more obese than men of different ages. As Japanese women age, obese Japanese women percent is more.
About 25% Japanese are obese. Obese Japanese are a quarter as many as Japanese population. Maybe we feel this is like a lot. But Japanese obese percent is the least in advanced nations. About 70% Americans are obese. These are over BMI 25 people percent. Japanese called over BMI 25 obese. WHO called over BMI 30 overweight and over BMI 25 obese. Only 3% Japanese are over BMI 30 in 2005. By the way about 30% Americans are over BMI 30.
But Japanese can fall diabetes less BMI than European and American. Probably Japanese are better to eat Japanese food than to eat the same European and American.
Problem and Solution
Obesity is a very seriously problem all over the world. Above all, what becomes the topic is metabolic syndrome. It is a state where someone has both two either or more among high blood sugar, high blood pressure, lipid abnormality in addition to obesity. If we leave it, we will lead to the death such as strokes. So, we have to prevent an obesity because metabolic syndrome is caused by obesity. The preventive is to improve a lifestyle. We can prevent the obesity by improving the moderate exercise and eating habits. We should keep two times a week of exercise.
Reference
http://ja.wikipedia.org/wiki/%E8%82%A5%E6%BA%80
http://tg.tripadvisor.jp/overweight/
http://www.jili.or.jp/lifeplan/rich/health/2.html
http://www.mhlw.go.jp/topics/bukyoku/kenkou/seikatu/himan/number.html