KYOTO (Kyodo) A man who taught part time at a cram school pleaded guilty Monday to fatally stabbing a 12-year-old girl at the school in Uji, Kyoto Prefecture, in December, and his counsel is seeking a psychiatric exam for their "delusional" client.

"I committed an irreparable mistake, and I would not have done this if I had committed suicide (first)," Yu Hagino, 23, told the Kyoto District Court. "I am sorry that I claimed a precious life."

Hagino is accused of murdering elementary school sixth-grader Sayano Horimoto in a classroom at the cram school on the morning of Dec. 10.