On one sunny Sunday afternoon this spring, dozens of people of various ages and nationalities converged on the basketball courts at Yoyogi Park in Tokyo. Juking, dunking, shooting and scoring, they played with grit as their competitive juices flowed.

But the players weren't there just for a casual pickup game. Many were helping out Ballers in Beijing, a sportswear donation project organized by Good Global Games (g3), a nonprofit organization based in Tokyo.

Founded by International Christian University student Jason Hutson in April, g3 is run by students, educators and artists interested in promoting cross-cultural youth outreach programs.