Toyota will build the cars and Waymo will drive them. Neither company controls the step that turns a factory order into a taxi service in Japan or Britain: the regulators who decide where a car with nobody at the wheel may carry paying passengers, and who answers when one of them crashes.

Much of the Japanese coverage read the partnership as the start of driverless taxi operations. Waymo’s own announcement is more careful. It describes a fleet that will begin “initial operations to test and validate” in Japan, with the United Kingdom and other markets left for the years after. That wording is the honest version of the deal, and it is also the version that leaves both companies exposed.

What Toyota and Waymo signed

The mechanics are simple. Toyota will build the 2027 bZ4X, the electric SUV sold in North America as the BZ, at its Takaoka plant in Toyota City, Aichi Prefecture, and fit Waymo’s self-driving hardware on the same site. Waymo says the whole process happens “under one roof”, from the base vehicle to the autonomous kit. The taxi version adds automatic doors, a power liftgate and generous rear legroom.

TechCrunch’s read is that, for now, this looks “more like a conventional vehicle supplier deal” than the platform alliance the two companies sketched in their preliminary agreement of April 2025, a pact the outlet filed under “let’s see what happens.” The new deal names a plant, a model and a country. It still names no operating zone, no fleet size and no fare.

That silence was deliberate. According to Japanese reporting on the announcement, Waymo co-CEO Dmitri Dolgov declined to say where in Japan the cars would run or how many there would be, promising detail as the company reaches commercial milestones. Hiroki Nakajima, Toyota’s executive vice president, described a plan that starts with small numbers and deals with problems as they surface before it grows into a full taxi service.

Japan’s legal door is open, but not all the way

Japan lifted its ban on Level 4 vehicles, which need no driver under defined conditions, on public roads when a revised Road Traffic Act took effect in April 2023. That law did not settle the questions that decide whether a robotaxi business works: which areas are designated for driverless operation, and how liability is allocated after an accident. Japanese coverage of the deal named exactly those two issues as the groundwork commercialization depends on, and noted that operating areas and fares were left for future discussion. The first bZ4X fleet will start testing in areas where autonomous driving is already permitted.

Waymo is also racing its own calendar and its rivals. It has already said it plans commercial service in Tokyo in 2027 with about 100 robotaxis run alongside taxi operator Nihon Kotsu and the ride-hailing app GO, using Jaguar I-Pace cars rather than Toyotas. Wayve, Uber and Nissan agreed in March to launch a Tokyo pilot by late 2026. Toyota is hedging too: in China it has begun mass production of vehicles developed with Pony.ai, with about 1,000 robotaxis planned for major cities.

London is the warning

Britain shows what happens when the technology is ready before the rulebook. In January, Waymo set a target of a fully driverless ride-hailing service in London in the fourth quarter of 2026. The Automated Vehicles Act 2024 created the framework, but the government still had to pass the secondary legislation that lets such vehicles operate, and the Department for Transport promised a passenger pilot scheme subject to safety requirements and the consent of local transport authorities, according to Local Transport Today.

By April, Waymo was testing about 100 I-Pace cars across 100 square miles of London, each with a human safety operator behind the wheel, and a spokesperson said the government had to finalize its trial rules before the company could run fully autonomously. TechCrunch’s report on the Toyota deal still describes the London service as waiting for the necessary permits. Black-cab drivers are hostile as well: the Licensed Taxi Drivers’ Association has dismissed robotaxis as a “fairground ride.”

Where the money sits

The economics explain why both sides signed anyway. For Waymo, building and fitting cars at a mass-production plant makes costs easier to control as fleets grow. For Toyota, supplying the platform for a driverless service opens revenue beyond selling cars, and the two companies will keep studying Waymo’s technology for privately owned Toyotas with Woven by Toyota. Both payoffs arrive only once the cars carry passengers without a driver, and that depends on decisions neither company makes.

Nakajima put it plainly in the joint statement: “No single company can achieve the goal of zero traffic accidents alone.” Waymo bills the project as Japan’s first fully autonomous ride-hailing service built on high-volume, domestically made cars. The first of those cars will leave Takaoka with a test plan, no published map and a sister service in London still waiting for its permit.

Tags: Japan, Waymo, robotaxis, Toyota, Toyota bZ4X