At the Blaisdell Arena, many athletes are competing in the Junior/Senior National Judo Championships.
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Just outside the arena, the Hawaii Bone Marrow Donor Registry set up a bone marrow drive for a well-known judo coach who is fighting for his life.
The registry is looking to sign up possible donors for many patients in need of a life-saving bone marrow transplant. That includes two time U.S. Olympic judo team coach Yoshisada Yonezuka.
Former Rainbow Wahine athlete Courtney Gaddis was there to urge people to sign up.
"About four years ago I donated to a four-year-old boy. I just think that a lot of times people take their health for granted and this is a great opportunity to be able to make a difference and help save somebody else who's fighting every day to stay alive," said Courtney Gaddis.
The Judo tournament continues Saturday and the registry will run from 10 a.m. to 2 p.m. to sign up more people.