Ashley M. Williams

USA TODAY Network

The world's oldest living person celebrated her 116th birthday Wednesday.

Misao Okawa, of Japan, has lived in three centuries. She celebrated her big day with staff at Kurenai nursing home, where she lives.

What does Okawa say are the keys to a long life?

"Eat and sleep and you will live a long time," Okawa told the Daily Telegraph. "You have to learn to relax."

Tomohito Okada, who is the head of the Kurenai retirement home, says Okawa eats three large meals a day and gets at least eight hours a night, according to the Telegraph.

"Her favorite meal is sushi, particularly mackerel on vinegar-steamed rice, and she has it at least once every month," he noted.

Last June, Okama was given the title of world's oldest living person after 116-year-old Jiroemon Kimura, also from Japan, died.

To date, the oldest person known to have ever lived was Jeanne Calment of France. She died at age 122, Guinness World Records reports.

Okawa was born in 1898 in Tenma, Osaka. In 1919, she married her husband and they had three children. When her husband passed away in June 1931, Okawa moved back to Osaka. Today, she remains there in good health, consistently surrounded by her children, four grandchildren and six great grandchildren.

Okawa doesn't just hold the title of the oldest living person in the world. She also holds the title of being a supercentenarian, a person who is at least 110 years old.

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