Police in Ogaki, Gifu Prefecture, stopped a 9-year-old boy driving the family car alone to his grandmother's house Monday.
The boy had driven about 3 km — halfway to his destination — before being stopped, police said Thursday.
"I learned to drive by watching my father and at game arcades," the third-grader was quoted as saying.
As Monday was a national holiday, traffic was relatively light in the morning and the boy caused no accidents.
Police cautioned his parents to watch the car more carefully.