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Sponichi Annex through Yahoo News (4/1/2015)
http://headlines.yahoo.co.jp/hl?a=20150401-00000038-spnannex-spo
Only the 3rd paragraph
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He underwent surgery for the first time in his life and received a 4cm long cut. They used a thread that would dissolve in the body after a time, but the part of the thread has not dissolved and came out of his body. He now has an infection around the affected area. To remove the part, he needs a simple surgery, but considering the lack of time before WTT, he decided not to have the surgery ((before WTT??)). He will train and condition himself and go into the competition with the problem in his abdomen, those muscles are required contracted during jumps.