  We investigated the statistical properties of the weight distributions of
Japanese children who were born in 1996, from recent data. The weights of 16-
and 17-year-old male children have a lognormal distribution with a power-like
tail, which is best modeled by the double Pareto distribution. The emergence of
the power-like tail may be attributed to the low probability that an obese
person will attain a normal weight.
