Why did japanese emperor hirohito authorize his military to bomb pearl harbor in late-1941?

Japan: Hirohito warned attack on Pearl Harbor would be 'self-destructive' Japan's wartime emperor, Hirohito, congratulated his forces on victories as the country made a brutal sweep across mainland Asia but warned that an attack on the US would be "self-destructive", according to a new biography

c. it required that townships set aside land for public schools.