Osaka, 20, shot to global fame on Saturday when she defeated 36-year-old American Serena Williams at Flushing Meadows to become the first Japanese player to claim a Grand Slam singles crown.
Terms of the deal weren't disclosed in the statement, but a spokesman said the contract would be for three years, Bloombergreports.
Nissan says Osaka will appear in global promotions and advertising for Nissan.
"Growing up, my dad drove a Nissan, so being able to be a brand ambassador now, it feels like I've come full circle", Osaka said at a contract signing event at Nissan's headquarters in Yokohama.
The 20-year-old Japanese-Haitian player beat Serena Williams in straight sets at the 2018 US Open during a dramatic showdown on September 8 which saw the American veteran get slapped with a hat-trick of code violations for receiving coaching, smashing a racket, and for verbal abuse.
Osaka admits that she is superstitious with regards to the music she tunes in to before her matches. "I don't think I'm a mix of three whatever, I just think I am me".
"Because it was my first final and my first grand slam victory, overall I felt really happy and I know that I accomplished a lot".
The Times reports her contract renewal with the brand is worth approximately $8.5 million.
But the company has been quick to add her to its "Creators Unite" campaign. Sports, the deal is set to be sealed later this week, possibly placing Osaka second to Serena, and above Caroline Wozniacki, on Forbes' list of highest-paid women in sports.
Due to her stellar rise in popularity, the young athlete is also expected to land more endorsement deals in addition to her current sponsors which include Yonex, Citizen and Nissin Foods.
The Grand Slam champion made a decision to join Nissan because she looks up to the brand's strong Japanese DNA and competitive spirit.
She has done so much for her ferocious serve as her down-to-earth humility.
"It's just who I am ..."
"But if you were talking about my tennis, I think my tennis is not very Japanese".
"I know the way that I was brought up, peopletell me I act kind of Japanese so I guess there is that".
Prosecutor Eric Maurel said that the suspect was in a state " mental confusion " during his arrest and was later sent to hospital. It is reported that two people were injured as a result of the collision of a vehicle into a crowd in Nimes.
A man who was trapped inside his New Bern , North Carolina , home by Tropical Storm Florence spoke with Fox & Friends on Saturday. They have made clear that this event is all about the water - which the storm has delivered in devastating quantity.
Air pollution in Beijing is disastrous, with the city consistently ranking among the places with the worst air quality in China . To do so, though, they need to comply with the whims of Chinese authorities.
The third-richest program, Michigan, is very far behind, raking in just $127 million in revenue and $75 million in profit. In the area of donations, Florida's athletic department received $138 million, followed by Texas at $123 million.
But instead, it was diverted to an airport in the remote Canadian city of Iqaluit, where fire crews rushed to the runway. Fire, police and EMS crews respond to a British Airways plane that was diverted to Iqaluit Wednesday.
But Hammers manager Pellegrini believes it makes little difference if the public know his starting team ahead of time. Asked if he knows the source of the leaks, Pellegrini said: "I don't have any idea, I'm not anxious about that".
Zorn later gave a statement that the unidentified man had been removed from duty and that the incident is now under investigation. Others were offended because they connect the gesture to President Donald Trump and conservatives.
Super Typhoon Mangkhut was expected to hit an area in the Philippines on Saturday that would affect more than 5 million people. Along with this projection, NHC warned of "life-threatening" storm surges and floods throughout both North Carolina and SC .
Cuellar said his department has "very strong evidence" to believe Ortiz killed the women, who he said were sex workers. According to the District Attorney all of the women were prostitutes who were allegedly picked up by Ortiz.
Florence expected to weaken as flood risk rises
That, and the storm's vast circumference of hundreds of miles, means Wilmington will be inundated with rain, the advisory said. Cruise ships have diverted to Florida away from the storm's path, and some hotels are offering special discounts for evacuees.
Microsoft acquires Lobe to help make AI accessible to everyone
The company now plans to the user the Lobe which is said to be only launched into the beta version which was earlier this year. With driverless cars for example, it can teach them to recognize a stop sign, or to distinguish a pedestrian from a lamppost.
Chelsea boss Sarri upbeat over Kovacic injury
The playmaker scored a stylish hat-trick as the Blues coasted to a 4-1 win over Cardiff City at Stamford Bridge on Saturday . Chelsea FC will kick off their Europa League group stage campaign on Thursday night when they take on PAOK away from home.
1M GM Vehicles Are Being Recalled
The software update is already available , so customers can begin to schedule repairs with their local dealer. More than 1 million of the trucks are in the US , and most of the rest are in Canada and Mexico.
IWC passes project to protect whales
Australia's commissioner Nick Gales rejected "the narrative of underlying dysfunction and intolerance" suggested by Japan. In 2014 Australia successfully challenged Japan's scientific whaling programme in the International Court of Justice.