Editor's note: An incorrect photo appeared in the section about Hitachi's lithium ion battery. It has been corrected.
YOKOHAMA, Japan -- Japan’s premier automotive engineering expo is bustling again along the Yokohama waterfront.
A record 488 companies are participating at this year’s meeting of the Society of Automotive Engineers of Japan, which runs through Friday. Some 80,000 visitors are expected.
Here’s a quick peek at five cool innovations on display.