Go's IPO — Japan's biggest so far this year — has done more than provide a much-needed boost to the country's languishing listing season. It has also supplied the taxi-hailing app with the capital required to address an existential issue: Japan's shortage of drivers.

Plaintiffs in the class -action complaint allege Rivian falsely promised for years it would bring hands-free driving to its first-generation R1 vehicles.

The company has identified at least 13 instances where its robotaxis drove into highway sections closed for construction.