Pacquiao -- who was born in the Philippines and currently sits as the country's senator -- is trying his best to help in relief efforts ... donating food, items and money -- but he's asking for much more.
"Whatever we raise," Pacquiao said in a video message Thursday, "all the donations, whatever it costs, I will double that so we can help more people."
Pacquiao says the disaster hits very close to home for him ... not just because he grew up in the region -- but because he went through homelessness and poverty as a youngster as well.
"I've experienced not having anything to eat and not having a place to sleep," Pacquiao said. "These people need our help."