Chinese students killed in Japan, Japan's execution of the death penalty so cautious

Event review： Jiang, a Chinese female student, was killed in her rented apartment in Nakano, Tokyo, Japan. According to Japanese police announced that Jiang Ge head was chopped edge, wound up to 10 cm, 15 minutes before the incident, Jiang Song also said the police had suspicious persons outside the apartment. However, when the police rushed to the apartment, they saw Jiangjiang songs lying in a pool of blood. Songs were sent to the hospital and died in the near future。
If in China the case would be defined as a vicious killings sentenced to death or life imprisonment, but in Japan, the murderer was only sentenced to 20 years in prison
Of course, I am not a favoritism and the law is never a panacea. However, when we serve as spectators and discuss cases that are not related to ourselves, I know that the families of each victim will hate this when the incident occurs Social civilization, hate civilized law.