Why Japan Is Falling Behind in Autonomous Driving

A technology leader faces a gap on the road

Japan wants Level 4 autonomous mobility services operating in 50 locations nationwide by 2025, with priority given to places facing serious shortages of professional drivers. Yet its early deployments remain limited, with autonomous buses cautiously operating on public roads while companies in the United States and China have moved into commercial autonomous taxi services in major cities.

As of June 23, 2025, that contrast presents a difficult question for a country known for its automotive engineering: why has its strength in building vehicles not translated into a leading position in putting vehicles without drivers into everyday service?

In the United States, Waymo, part of Google, and Cruise, part of General Motors, have been prominent names in the development of autonomous taxis. In China, Baidu, WeRide and Pony.ai have pursued commercial services. Japan remains largely focused on experiments, controlled operating conditions and particular routes.

Japan's slower progress involves several connected problems: the pace of regulation, access to driving data, difficult road conditions, public concern about safety and the way companies turn engineering projects into businesses. Each affects the others. Limited deployment produces fewer opportunities to collect operating data, while uncertainty about safety and commercial returns encourages companies and authorities to proceed cautiously.

The stakes extend beyond a competition between technology companies. Japan's ageing population and declining number of professional drivers are putting pressure on regional transport. Autonomous buses and taxis could help older residents keep travelling and help communities maintain services when there are fewer people available to drive them.

What Level 4 actually means

The Society of Automotive Engineers, or SAE, defines six levels of driving automation, running from Level 0 to Level 5. Level 0 means no driving automation. Level 5 describes a vehicle capable of driving autonomously in all environments.

Level 4 sits below that final category. A Level 4 vehicle can operate without human intervention within specified conditions. Those conditions might limit where it travels or the circumstances in which it operates. The central idea is that the vehicle can handle the driving within its permitted setting, rather than depending on a person to perform that task.

A service restricted to a particular route can therefore represent genuine autonomous operation while still having a much narrower reach than a vehicle that can travel anywhere. This helps explain why a small autonomous bus service and a robotaxi operating across an urban area can share the Level 4 label while presenting very different operational demands.

The United States and China are already piloting Level 4 services in urban areas. Japan's activity remains more concentrated on specific routes and controlled environments. Its challenge is to turn these limited deployments into transport that can serve more people reliably.

Regulation shapes how quickly services grow

Japan's legal framework has been slow to adapt to autonomous driving. A revised Road Traffic Act allowing limited autonomous vehicle operations has taken effect, but many experiments remain restricted to particular areas and require human oversight.

Authorities must decide where vehicles can operate, what safety conditions they must satisfy and how much supervision is required. Those decisions affect how quickly a company can move from testing technology to carrying passengers as a regular service.

Japan's Digital Minister, Taro Kawano, has described the delay as a regulatory failure:

We cannot avoid calling it a failure of regulation that Japan is behind other advanced countries in introducing autonomous vehicles.

Japan's emphasis on safety and avoiding risk helps explain its cautious approach. However, slower permission for wider operations also means fewer opportunities for early commercial activity and for collecting data from everyday driving.

The United States and China have supported broader pilot programmes and commercial deployments through different political and business arrangements. Japan faces the task of allowing more extensive testing and service expansion while keeping appropriate safety standards.

Why driving data matters as much as engineering

Japanese manufacturers have extensive expertise in automotive engineering. Autonomous driving also requires another kind of capability: developing artificial intelligence that can interpret a changing road scene and choose how a vehicle should respond.

Modern autonomous systems rely heavily on machine learning. Put simply, this means training software with large amounts of information so it can recognise patterns and respond to situations. For driving, the information must cover the many conditions a vehicle may encounter on real roads.

American technology companies such as Google and Apple, along with Chinese companies such as Baidu, have access to enormous datasets through their digital platforms and user bases. Japanese companies have struggled to build comparable systems for collecting and using data, limiting their ability to train and improve autonomous driving software.

Professor Shuji Nakamura, an AI researcher, identifies the commercial organisation of data collection as a central weakness:

Japanese companies lack the business models to collect and utilize large-scale data for AI development, which is a fundamental reason for the delay.

His argument connects the technical problem to the business problem. A company needs a workable way to gather and use information repeatedly, as part of an operating service. Engineering progress depends partly on whether the business can create that continuing flow of experience.

Partnerships and data sharing, both within Japan and internationally, are among the proposed responses. The aim is to give developers more varied information with which to train and validate their systems.

Japan's streets demand local solutions

Japan's road environment makes autonomous driving difficult in practical ways. Narrow, winding streets can place vehicles close to pedestrians and cyclists, while mixed traffic creates situations that software must interpret quickly and accurately.

Heavy rain, snow and fog add further complications. A system needs to understand its surroundings across changing conditions, requiring sophisticated sensors, capable AI software and extensive information from the places where it will operate.

Japan's use of vehicles with the steering wheel on the right, together with its local traffic rules, also affects how overseas systems can be adapted. Japanese developers must invest time and money in collecting and processing local driving data.

These conditions make the move beyond a fixed route especially demanding. A system developed for one limited setting needs further training and validation before it can handle a wider range of streets and weather.

Local data collection therefore sits at the centre of Japan's task. The country's engineering strengths must be joined with software and operating experience suited to its own roads.

Public caution influences business decisions

Japanese public concern about autonomous vehicles includes safety, the possible loss of enjoyment from driving and potential job losses in transport. Surveys described in the debate indicate that a majority of people feel uneasy about fully autonomous vehicles.

That unease influences both policy and corporate decisions. Automakers face pressure to demonstrate dependable performance, while authorities must consider how communities will respond to services that remove a familiar human role from transport.

Satoshi Shimoyama, an expert in autonomous vehicle policy, describes the connection between social caution and company behaviour:

The Japanese national character is overly cautious about social implementation, making it difficult for pioneering companies to take bold steps without fear of backlash in the event of an accident.

A prominent accident could bring intense media scrutiny and public anger, potentially stopping progress for years. Companies weighing an investment must consider that possibility alongside the technical and financial demands of deployment.

The description of a cautious national character is Shimoyama's assessment. The practical issues facing services are concrete: passenger confidence, the response to accidents, concern about employment and the willingness of companies to expand.

Public engagement is therefore part of the proposed response. Explaining the benefits and safety of autonomous vehicles is intended to build trust as services develop, particularly in communities where transport shortages are becoming more urgent.

Turning a technology project into a transport business

Japanese companies have traditionally approached autonomous driving by concentrating first on engineering and considering commercial models later. The priority has been to perfect the technology before deciding how it should operate as a wider business.

Companies in the United States and China have placed greater weight on building services while the technology continues to develop. Pilot programmes, partnerships and mobility businesses give them opportunities to collect operating data and introduce passengers to autonomous travel.

Uber and Waymo illustrate the American focus on ride services involving autonomous vehicles. In China, Baidu's Apollo Go and Pony.ai have expanded robotaxi services in major cities with support from government initiatives and partnerships between public authorities and private companies.

These businesses treat autonomous driving as the basis for services in passenger transport, logistics and urban planning. Regular operations can connect software development, passenger demand, partnerships and revenue within the same business.

Japan's stronger emphasis on developing the technology has left less attention for how autonomous systems fit into broader commercial networks or create practical value for communities. Moving toward service development would mean considering who will use a vehicle, who will pay for it and how it will remain useful after a trial ends.

The policy proposals therefore extend beyond building a more capable vehicle. They include developing new services and business models, along with closer cooperation between automakers, technology companies, government agencies and universities.

Three countries, different routes to deployment

The United States relies heavily on private companies to drive autonomous vehicle development. Tesla, Waymo and Cruise have been prominent participants, with government generally leaving much of the pace of development to the market within its regulatory framework.

China gives government a more active role. Autonomous driving is a national strategic priority, and leading companies benefit from substantial funding and policy support. Government initiatives and commercial partnerships help connect development with deployment.

Both countries have shown a greater willingness to experiment, accept setbacks and use operating experience to improve their technology. Broader activity on real roads provides more data, which can then support further development.

Japan has placed greater weight on safety and building agreement before expanding. This incremental approach has helped preserve public trust and avoid major accidents, while restricting the pace at which companies gain experience and compete internationally.

The contrast involves regulation, investment and commercial organisation as well as attitudes toward risk. Japan's proposed response brings those issues together: wider testing, stronger data collection, workable transport businesses and cooperation across institutions.

Driver shortages give Japan a pressing reason to act

Japan's Ministry of Land, Infrastructure, Transport and Tourism highlights autonomous buses and taxis as possible ways to address driver shortages and sustain public transport in rural areas. For older residents, the practical benefit could be continued access to transport as the population ages.

Japan's target of Level 4 mobility services in 50 locations nationwide by 2025 focuses on areas with acute shortages of drivers. The target sets a geographic ambition, although the precise operating conditions and reach of individual services determine how much transport they can provide.

Toyota, Honda and Nissan are investing in autonomous vehicle research and pilot programmes, often with local governments and startups. Autoware, an open source operating system for autonomous driving, is another avenue for innovation and cooperation.

Proposed changes include streamlining regulation for more extensive tests and commercial deployment, developing ways to collect and share data, engaging the public and giving greater attention to business models. Cooperation among manufacturers, technology companies, public agencies and universities is intended to help address both technical and social difficulties.

Japan also faces an industrial challenge. Electric vehicles and autonomous driving are reshaping the global automotive market. Countries that lead these technologies are likely to have greater influence over standards and capture more of the value created by new transport businesses.

For Japan, commercial competitiveness and local mobility are closely connected. A service that can operate reliably and sustainably could help a community retain transport while giving developers the experience needed for wider deployment. The immediate task is to turn limited trials into services that meet those everyday needs.

Key Points

• As of June 23, 2025, Japan trails the United States and China in the commercial deployment of autonomous driving.
• Level 4 vehicles can operate without human intervention within specified conditions; Level 5 means autonomous operation in all environments.
• Japan's slower progress involves regulation, data collection, difficult roads, public caution and business priorities.
• American and Chinese companies have pursued broader services that generate operating experience and driving data.
• Japan aims to deploy Level 4 mobility services in 50 locations nationwide by 2025, prioritising places with serious driver shortages.
• Toyota, Honda, Nissan, local authorities, startups and initiatives such as Autoware are contributing to development.
• Autonomous buses and taxis could help sustain regional transport as Japan's population ages and professional drivers become scarcer.