They knew that Japan's plans for attacks and invasions throughout Western Pacific~East Asia to expand their "Greater East-Asia Co-Prosperity Sphere" would be attacked and hampered if the US Navy Pacific Fleet was functional. The attack on Pearl Harbor was an essential "pre-emptive" but wasn't a stand-alone. The also did attacks in the Philippines and several other places; China, Hong-Kong, Southeast Asia, Dutch East Indies, etc.Again, Tojo and Yamamoto thought they were "justified", too.
Either you flunked world history and hence know nothing, or you are intentionally spewing disinformation and pravda.
I vote you are doing both.

