Police on Friday finished questioning a 23-year-old Japanese man after he was deported from Turkey for allegedly attempting to join the Islamic State group, finding he had not committed a crime, according to investigation sources.

According to police, who had been questioning him on a voluntary basis about why he was in southern Turkey and where he was headed, the man has said, "I got fed up with living in Japan. I thought going abroad would lead to a change."

"I never imagined that my trip would cause this much trouble," he said.