TOKYO (AP) _ A high-tech top designed by a retired college professor spun for more than 90 minutes at a park in southwestern Japan on Sunday, breaking a world record, park officials said.

The top, built by Inosuke Mori, 69, spun for 1 hour, 37 minutes and 42 seconds, eclipsing the old record of 1 hour, 21 minutes and 35 seconds set in 1986, said Akiko Yamamoto of Sanuki Children's Park.

The record was set during a spinning top demonstration for 500 children interested in science in Takamatsu, 340 miles southwest of Tokyo.

Mori is a retired professor of mechanical electronics at Takamatsu National College of Technology. Yamamoto said the park would submit the event to the Guinness Book of World Records this week.

The previous record was held by a 25-member team from Japan's Kawasaki Steel Corp., she said.