Demographically speaking, I think Japan would be the perfect place to test the basic income: A largely homogenous society where there is almost no one from the outside to be seen as a "freeloading", collectivist values forming strong group bonds too.

Unfortunately, I have spoken to a lot of people in Japan who are dead against any kind of social security. It's not an unusual to view unemployed and poor people as 100% responsible and worthy of no empathy.