Fifteen years after a man stabbed eight children to death and injured 15 other people at an elementary school in Ikeda, Osaka Prefecture, the parents of one of the victims are speaking about their experience and lobbying for better security at such facilities.
Mamoru Takuma, 37, burst into the school on June 8, 2001, and stabbed victims apparently at random.
Takuma was convicted and then executed in 2004.