Why did Japanese emperor Hirohito authorize his military to bomb Pearl Harbor in late 1941

The reason why Japanese Emperor Hirohito authorize his military to bomb Pearl Harbor in the late 1941 was because he has hopes in destroying the U. S navy that is residing in Pearl Harbor.

To gain a leg up

Explanation:

The US arranged all military ships but 3 aircraft carriers in Pearl Harbor in hopes that Japan would calm down. However the Japanese saw this as a good opportunity to try and cripple the US fleet so they could perhaps force a peace deal. This was a missee opportunity, however. WNile many ships and lives were lost that day, the Japs didn't hit key oil/gas ships and also didn't bomb the planes like they could've. All this caused for an ultimate flop of an attack.