Claim: Hiroki Uchi was hospitalized for  pulmonary pneumothorax and was pulled from shows for surgery to repair two holes in his left lung.
Evidence: Hiroki Uchi (内 博貴, Uchi Hiroki) (born September 10, 1986) is a Japanese idol singer, songwriter, actor and model. Dream Boy shows (along with KAT-TUN), Uchi was diagnosed with and hospitalized for pulmonary pneumothorax, a condition which causes holes to form in the lining of the lungs. Uchi was pulled from both shows for the urgent surgery to repair the three holes in his left lung.