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TOKYO (Reuters) - A Japanese teenager was forced by his teacher to write an apology in blood after dozing in the classroom, the school's principal said on Monday.



The teacher later went to high school principal Hiroaki Dan and confessed what he had done, Dan told Reuters.


The teacher had apologized to the 17-year-old boy and his parents, Dan said, confirming a local media report of the incident, which happened last Thursday.


He said the boy was taken to the staff room of the school in Fukuoka City, southern Japan, after being caught asleep during a lesson. The 40-year-old male teacher handed the boy a box-cutter and paper and told him to write an apology in blood.


The teacher left the student, who then cut his finger and began to write an apology using his own blood.


Other teachers in the staff room did not notice what was happening, Dan said.


"To ask a student to write in their own blood is something I just can't imagine," he said.


He said the boy was back in school, and neither he nor his parents had asked to switch teachers. The teacher involved is expected to resume classes in a few days, Dan said.


The incident comes on the heels of an attack in which an 11-year-old girl killed a classmate by slashing her throat with a box cutter, also in southern Japan.