ThirdTerm
Severely Conservative
Aside from declare war on them and invade Singapore and Malaysia
There was a strategic rationale for taking out the Pacific Fleet at Pearl Harbor just before invading the Philippines, which was an American colony at the time. The US Pacific Fleet would have come to the rescue, if Pearl Harbor had not been attacked in advance, and the Japanese invasion of Manila would not have been successful.
Manila Bay ports did not have the capacity to support a large fleet, so the only naval base that the US Navy could use to protect the Philippines was Pearl Harbor, located 5,000 miles away. Japanese bases were only 1,500 miles from the Philippines, allowing Japan to send in large numbers of troops in a short period of time. But unlike the Dutch East Indies where Japanese troops were viewed as liberators, Filipinos did not need Japanese help to gain independence, which was already planned and promised by Washington.