I don't know his actual connection to the sport or its origin, but, from the very few videos of him climbing and talking about it, you can see how much he loves the sport.
Jason Momoa is an avid climber. He has been climbing since he was a teenager. The main discipline that he loves is bouldering, as that is also what he started with.
He isn't a stranger to sport climbing either, he has climbed in various locations around the world, including Yosemite National Park. Momoa has talked about how climbing helps him stay physically and mentally fit, and he encourages others to try it too.
He has also incorporated his love of climbing into his acting career by staring in a new docuseries on HBO Max called "The Climb", which he stars alongside his friend Chris Sharma, one of the greatest climbers in the world.
There are a few videos on his YouTube channel specifically about climbing, which further show his love for the sport.
It's great that someone with such an influence like him is able to introduce the sport of climbing to more people.
