A manager of a "juku" cram school was arrested Tuesday on suspicion of kidnapping a 7-year-old boy from Tokyo's Itabashi Ward as the first-grader was on his way to school.

Yoshikazu Ueno

The suspect -- identified as Yoshikazu Ueno, 38 -- allegedly abducted Yuta Seto and released him unharmed Monday afternoon, about eight hours after he was kidnapped and after his mother handed over a 5 million yen ransom to a motorcycle courier, police said.