A 9-year-old boy is in a serious condition after collapsing during judo practice in Tomigusukushi, Okinawa, on Sunday morning.
According to local media reports, the boy had been complaining of a headache and vomited. Shortly after, he collapsed and fell unconscious at around 11 a.m., TV Asahi reported.
The boy was taken to hospital where he was diagnosed with acute subdural hematoma, officials said.
Media reported that the boy had been participating in a particularly intense training session along with three instructors, and a class full of other young boys.
Police are conducting interviews with the instructors from the dojo and looking into the circumstances leading up to the boy's collapse.© Japan Today