TOKYO, Japan  (AFP) — A Japanese father stabbed his 12-year-old son to death after complaining the boy was failing to study for a school entrance exam,  media said Tuesday.  Kengo Satake, the boy’s 48-year-old father, told police that he “argued with his son for not studying” before a test to enter a private junior high school, public broadcaster NHK reported.  Competition for entry to the best schools in Japan is intense. Admission to a prestigious one […]