Maybe this could be a source?The question is whether your friend's sources are reliable. I haven't come across a single credible source (such as Yomiuri or Mainichi Shinbun) reporting about the injury. Instead, I got Nikkan Sports and Friday (pretty much a gossip magazine) which have notorious reputations for disseminating questionable, exaggerated and, more often than not, false news, giving accounts about his injury. And that just puts me off. I guess we'll never know about the truth unless it comes directly from Yuzu himself. If he is indeed suffering from it, I hope he gets well soon.