He paid an unspecified amount of money for the privilege. "This is my lifelong dream".
Maezawa announced on Monday that he plans to select six to eight artists to accompany him on his journey around the moon.
Maezawa added, "Ever since I was a kid, I have loved the moon; just staring at the moon filled my imagination; it is always there and has continued to inspire humanity".
"The artists that fly on the "#dearMoon" mission will be asked to create works of art after the mission inspired by the flight.
As of today, only 24 humans - all Americans have traveled from Earth to the moon. The outpost would serve as a stepping-off point for the lunar surface, Mars and points beyond.
After being announced as the first BFR customer, Maezawa joined Musk on stage.
"He stepped forward", Musk added. To be clear, we are honored that he would choose us.
'This is risky, to be clear. "This is no walk in the park", Musk said. "It's not a sure thing". There is a chance something could go wrong'.
Although its Falcon Heavy rocket was set to fly in 2013, the first, and only flight, of the heavy lifter happened some five years later, and lobbed Musk's Tesla Roadster into space to puzzle future extraterrestrial visitors. He and his guests will become the first lunar travellers since Nasa's Apollo 17 mission in 1972.
"He is, I think, the bravest person and most willing to do so", Musk said, referring to Maezawa.
The company is still developing the BFR rocket, which will be the successor to SpaceX's oft-used Falcon 9 rocket and its upgraded version, the Falcon Heavy. A grand total of 31 Raptor engines will power the BFR. It has contracts with the U.S. National Aeronautics and Space Administration to carry cargo and crew to the International Space Station.
The capacity will eventually be 100 tonnes, said Elon Musk, but the rocket will always be able to reach the Moon and, one day, Mars.
Amazon.com founder Jeff Bezos' Blue Origin and Richard Branson's Virgin Galactic are also battling it out to launch private-sector spacecraft, but neither have so far announced plans as ambitious as SpaceX.