A Waymo robotaxi in San Francisco.Gado via Getty ImagesWaymo, the top U.S. robotaxi company, is looking to expand the business internationally with plans to begin its first overseas tests in Tokyo early next year, while it also continues to expand the service to more U.S. cities.The Alphabet Inc. subsidiary will send a fleet of electric Jaguar I-Pace SUVs to Japan early next year to begin mapping some of the densest districts of central Tokyo. To aid that effort, Waymo said its partnering with Nihon Kotsu, Japans biggest taxi operator, and taxi app operator GO. The company didnt offer a timeframe for when it expects the driverless vehicles to be in commercial service.The news comes on the heels of Waymos plan to launch its ride service in Miami next year, along with Austin and Atlanta. Currently, its available in Phoenix, San Francisco and Los Angeles, where every week it carries more than 150,000 riders combined. The company doesnt share financial details for the service, though its annualized revenue is tracking at more than $150 million based on the weekly ridership rate.Last week, General Motors announced it was pulling the plug on Cruise, its competing robotaxi service and Waymos biggest U.S. rival, deciding instead to focus its autonomous driving tech efforts on personal vehicles. Elon Musks Tesla aspires to be a leader in robotaxis something thats helping boost its stock price in the wake of Donald Trumps election win but the company hasnt demonstrated that it has the ability to do that.Despite the name, Teslas Autopilot and Full Self-Driving features are classified as advanced driver-assist technologies that arent capable of operating a vehicle without a human at the wheel, ready to take over. By contrast, Waymos robotaxis operate with no human driver, though the company does have staff monitoring them and who can provide some remote backup assistance.In November, Waymo said it had raised $5.6 billion in its biggest-ever funding round ahead of major expansion plans. Additionally, it intends to begin sourcing electric vehicles from Hyundai starting next year, which cost about 40% less than the I-Pace model it uses, as it also shifts to lower-cost computing and sensor hardware.More From Forbes