Moai is a Japanese word for a lifelong friendship. Friends for good and bad times. Those are the friend you meet periodically and be YOU. Nothing needs to be hidden or be pretend to someone else. They accept You without question. No judgment.
Especially this ancient tradition is still going on in Okinawa. That is the place for well-known people who live a very long & healthy life. Okinawa is a beautiful island, and food (seafood) is the most important secret factor. I figured Moai friendship matching starts when the kids are very young. They pretty much take care of their social group for lifelong. When they are taking care of them, actually, they are taking care of themselves.