TOKYO - A video emerged Wednesday showing a volleyball coach repeatedly slapping a schoolboy -- just days after Tokyo was awarded the 2020 Olympics - in the latest example of brutality to tarnish Japanese sport.
Separately, world judo champion Shohei Ono was slapped with a three-month ban for physically abusing junior members of his university judo squad.
A short clip posted on YouTube and other video-sharing sites showed the teacher at a senior high school in central Japan smacking the student's face at least 13 times in 16 seconds. It was authenticated by the school.
The episode was captured on a mobile phone by another student during a practice game near Gifu city. By Wednesday evening it had garnered some 1.6 million viewings on YouTube.
"Don't joke around, kid! Do you understand? You're stupid," the teacher yells in the video as he repeatedly slaps the student's face.
According to the school, the teacher has admitted the physical abuse of the second-grader, saying: "I wanted to shake him up, but I went about it the wrong way".
Students in Japan are 16 or 17 years old in second grade of high school.
Toshitaka Shiozawa, assistant principal of Hamamatsu Nittai Senior High School, told AFP the 41-year-old teacher had also beaten another student on the same day. He declined to reveal the teacher's name.
Neither student suffered any lasting injuries in the attacks, Shiozawa said, adding the school was considering disciplining the teacher as "we regard the act as corporal punishment".
The school held an emergency meeting with parents of students on the volleyball team Tuesday evening, at which the teacher and the school principal apologised, Shiozawa added.
In May last year, the same teacher also slapped a student's face, causing a nosebleed, but the school did not take any punitive measures "because the student did not complain", he said.