Considering there were there were over 200,000 Japanese troops on Luzon (as opposed to 100,000 on Okinawa, only 76,000 of which were actual Japanese Military, the remaining 24,000 being impressed Okinawans) I'd be careful about calling it an "occupation"
The Army fought and defeated some of the best units the Japanese had, to include the only Japanese armored division faced by US forces in the pacific war. Luzon also included the biggest urban combat in the Pacific war in the Battle for Manila.
There were a total of 450,000 Japanese troops in the Phillipines and surrounding islands. By the end of the war the only effectives left were less than 50,000 hold up in the mountains of Northern Luzon. US Army forces eliminated the equivilant of 20 Japanese divisions in the space of eight months.
The total casualties for the Phillipine campaign were 15,000 dead and 50,000 wounded. Excluding naval casualties.
The total casualties for Okinawa were 7,400 dead and 32,000 wounded. Excluding naval casualties.
By every measure that matters, Luzon was a much bigger campaign than Okinawa.
for the entire Philippine campaign, but not for Luzon. You said "Luzon".