Absolutely not.
The US were already attacking the Pacific ocean region, and Japan assaulted each of those locations, aswell as Pearl harbour.
They also launched attacks on US bases "in the philippines", and "Guam", and "Wake Island", aswell as Pearl harbour.
".[14] Japan intended the attack as a preventive action to keep the United States Pacific Fleet from interfering with its planned military actions in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and the United States. Over the course of seven hours there were coordinated Japanese attacks on the U.S.-held Philippines, Guam, and Wake Island and on the British Empire in Malaya, Singapore, and Hong Kong.[15]".
https://en.wikipedia.org/wiki/Attack_on_Pearl_Harbor .
The US first began waging war in the Pacific region in around 1902, after they received the Philippines from the Spanish as part of the treaty of Paris agreement, however the Philippinos did not believe that the Spanish had any rights giving the Philippines to the USA, and they denied the US access, so the US invaded.
"The Philippine–American War,[11] also referred to as the Filipino–American War, the Philippine War, the Philippine Insurrection or the Tagalog Insurgency[12][13] (Filipino: Digmaang Pilipino–Amerikano; Spanish: Guerra filipino–estadounidense), was an armed conflict between the First Philippine Republic and the United States that lasted from February 4, 1899 to July 2, 1902.[1]".
https://en.wikipedia.org/wiki/Philippine%E2%80%93American_War .
Official figures state 200,000 Philippinos died in this war, though unofficial figures speculate it was 1 million.
"The war resulted in at least 200,000 Filipino civilian deaths, mostly due to famine and disease.[19][20][21][22][23][24][25][26] Some estimates for total civilian dead reach up to a million.[27][8]".
https://en.wikipedia.org/wiki/Philippine%E2%80%93American_War .
There is also not much genetic difference between Japanese citizens and Philippinos, they are both descended from the Jomons.
"By the end of the Incipient Jōmon phase, around 8000 BCE, a semi-sedentary lifestyle apparently led to an increase in population density, so that the subsequent phase, the Initial Jōmon, exhibits some of the highest densities known for foraging populations.[b] Genetic mapping studies by Luigi Luca Cavalli-Sforza have shown a pattern of genetic expansion from the area of the Sea of Japan towards the rest of eastern Asia. This appears as the third principal component of genetic variation in Eurasia (after the "Great expansion" from the African continent, and a second expansion from the area of Northern Siberia), which suggests geographical expansion during the early Jōmon period.[c] These studies also suggest that the Jōmon demographic expansion could possibly have reached America along a path following the Pacific coast.[d]".
https://en.wikipedia.org/wiki/J%C5%8Dmon_period#Population_expansion .
The USA had absolutely no right to be invading the Pacific, and they had absolutely no right to tell US citizens in the news that they were the good guys defending the poor philippinos from the Japanese.
The Philippinos are pretty much the same people as the Japanese, and the Japanese were not so much wanting to conquer the Philippines, so much as get the Philippines back, and free of US or Spanish rulership.
So no, Pearl harbour was not the reason they entered WW2.
That was just the best pretext to use, to convince the US public to vote for the US to go and defend US values, thus allow the US to go and attempt to farther their corporate and imperical goals and expansion in the Pacific region.
Photo below with link, of the massacre of Philippinos from day 1 of US 1902 invasion of the Philippines. (this was for no reason whatsoever may i add. And nowhere is it stated even by the US, that prior to this invasion, had the Philippinos done anything untoward to the US, in any shape or form. They had not, The US to this day have no other reason for this massacre, than they simply wanted the land for themselves).
https://en.wikipedia.org/wiki/Philippine%E2%80%93American_War#/media/File:Filipino_casualties_on_the_first_day_of_war.jpg