Ryo Chonan updated his blog last night:

"I'm surprised to hear about Yoshida. His opponent, Karo Parisyan, backed out at last minute. Karo said he was in the best shape when I talked to him yesterday. I wonder what happened to him. Yoshida's mom came here to see his fight all way from Japan and he had a hard time dieting for this fight. I'm sorry for him. Charged with a role as the only fighter who represents Japan, I'm going to have a great performance tomorrow."

Translation from SukiMMA