Japanese high court sentenced a defendant to death penalty. In 1999, the defendant killed and raped a woman, then smashed her baby onto the ground a couple of times. He was only 18 years old so that a major point of this case was "He can be rehabilitated or not". Basically the law for infancy (younger than 18) is not strict because some judges believe defendants can be rehabilitated. However, I think it depends on the case. Although the defendant killed two people, he didn't show any regret. Besides, he sent a letter to his friend and it said "The laws protect me so I'll be back to the society soon and enjoy killing people again".
"Under the Juvenile Law, anyone under 18 years of age is exempt from being sentenced to death."
I think this law and the judges who support that are spoiling the country.