Japan's fascination with high technology will reach fever pitch March 17 when the Tsukuba Expo '85, the International Exposition at Tsukuba City 31 miles north of Tokyo opens. It's a huge display of futuristic electronic gadgetry.
Prime attractions will include a TV screen as tall as an eight-story building and a 30-foot tomato tree grown by researchers using light-absorbent optical fibers. Then there's a bullet train that floats on a cushion of electromagnetic force, that visitors can ride.
The exhibit runs through Sept. 16. Admission is $10 for adults, $5 for ages 15-22 and $2.50 ages 4-14.
Among scores of exhibitors will be a U. S. demonstration of super-computers that foreshadow machines with a capacity for inference and logic.