In 2014, Naomi Osaka's family received an eviction notice for their condominium in Florida while she was still pursuing her tennis career. At that time, her earnings were insufficient for financial stability. Just a year later, she earned only $6,290 in the first half of 2015, a stark contrast to her later achievements.

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Osaka's professional journey began under the coaching of her father, Leonard François. Inspired by Richard Williams, he opted to develop his daughters, including Osaka and her sister Mari, outside the traditional American junior tennis system. The family had emigrated from Japan to the U.S. when Naomi was three and eventually settled in Florida.

The financial strain in 2014 accompanied a significant moment in Osaka's career. As reported in Ben Rothenberg's biography and by Tennis.com, the family faced eviction just before she qualified for the Bank of the West Classic in Stanford. The pressure mounted, but this tournament proved to be a turning point. Osaka, at just 16, qualified for the main draw and defeated former world No. 4 Samantha Stosur, earning $10,000 in prize money, which drew more attention from sponsors.

Despite this breakthrough, her finances remained modest. In early 2015, her earnings were still low compared to her future success, while Mari earned $2,160 in the same timeframe. Osaka continued to rise in the professional rankings, but major accomplishments lay ahead.

Osaka's ascent accelerated in 2018 when she claimed her first WTA title at Indian Wells. Later that year, she won her first Grand Slam singles title at the US Open by defeating Serena Williams. In January 2019, she won a second consecutive Grand Slam title at the Australian Open, becoming the first Japanese player to reach No. 1 in the WTA rankings at 21 years old.

With additional Grand Slam victories at the US Open in 2020 and the Australian Open in 2021, Osaka totaled four titles. Her financial situation transformed, with Forbes estimating her earnings at $37.4 million between June 2019 and June 2020, making her the highest-paid female athlete during that period.

Osaka’s success paved the way for her business ventures. She invested in BodyArmor in 2019 and received an equity stake in the company, which Coca-Cola later acquired for $5.6 billion in 2021. In 2021, she also authored her entry into sports ownership by investing in the North Carolina Courage of the National Women’s Soccer League, emphasizing her desire to support women in sports.

Her entrepreneurial ventures include launching KINLÒ, a skincare brand, and Hana Kuma, a media company. In 2024, she engaged in funding rounds for various other companies, expanding her business portfolio alongside her tennis career.

By 2026, Osaka ventured into fashion, unveiling a luxury leather-goods project at the Uncharted’s Fame to Fortune Summit. She described this project as her “biggest dream” outside of tennis. Earlier that year, she returned to IMG for tennis representation after previously co-founding the sports agency Evolve.

Now an active competitor, Osaka's career includes four Grand Slam titles and a career-high No. 1 ranking. Her journey illustrates the dramatic change from facing eviction in 2014 to establishing a diverse business career while still competing at the highest level in tennis.