The 23-year-old has a personal connection to the country: her father comes from there.
"It really hurts to see the devastation going on in Haiti, and it really feels like we'll never get any respite," she wrote on Twitter.
"I will play a tournament this week and all the prize money will go to facilitate the efforts for Haiti.
I know that the blood of our ancestors is strong, we will rise again. "
Naomi Osaka was born in Japan, where her mother comes from, but has lived in the United States since she was three years old.
The 7.2 magnitude earthquake occurred about 160 km from the capital Port-au-Prince and has been measured to be even stronger in magnitude than the devastating 2010 earthquake, which killed more than 100,000 people.
KLIPP: The world's oldest tennis player continues to bet - wants to play after 100 (July 16)
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Leonid Stanislavskyi has been named the world's oldest tennis player by the Guinness Book of Records.