If you've taken a Grab or used another ride-hailing app in Southeast Asia recently, you've likely noticed a change. A growing number of drivers are no longer driving just Japanese gasoline-powered autos, but a string of unrecognizable electric vehicle (EV) models made by other countries. Make no mistake, these fashionable looking cars might not be recognizable, but their manufacturers, notably Chinese and even Vietnamese, are aggressively taking market share away from legacy Japanese automakers. According to the PwC ASEAN-6 Automotive Market Snapshot, EV adoption in the region rose from 9% in 2023 to 13% in 2024. This growth is being led by Chinese manufacturers, who are boldly challenging Japanese incumbents.

Chinese automakers like BYD aren't just selling cars using deep discounts, they're underwriting regional assembly and supply chain integration, displacing Japanese market share that long anchored ASEAN as a quasi-domestic market for legacy automakers Toyota, Nissan and Honda. Added to the fray for Japan, the industry's relatively slow transition to fully electric models created a vacuum that Chinese brands have filled with technologically advanced, affordable alternatives.

Thailand and Vietnam are now established EV hubs, with Indonesia and Malaysia reportedly soon to follow suit. This comes as several ASEAN members continue to leverage free trade frameworks to optimize regional production networks, attract capital and underscore structural shifts in industrial alignment. Worse yet for Japanese automakers, the move by their ambitious competitors to produce more EVs represents not just product evolution but a successful challenge to entrenched industrial leadership. What can Tokyo do? It depends on whom you ask. According to recent reports, the loss of market share is creating a ripple effect that threatens an extensive regional supply chain, which includes over 2,700 Japanese parts manufacturers. As sales of Japanese internal combustion engine (ICE) vehicles slump, major automakers are being forced to restructure.

Honda, for its part, has consolidated its Thai factories, while Mitsubishi Motors suspended production at key plants to cut losses. This reduction in output directly impacts local subcontractors, who rely on high-volume orders from these finished vehicle plants. To counter this "Chinese assault," Japanese firms are also pivoting toward hybrid vehicles, a segment where they still maintain a competitive edge. They are also seeking closer cooperation with several ASEAN governments to develop a long-term road map for regional auto production.

But it's not just Chinese EV makers creating the shift in ASEAN auto markets, Vietnam has also joined the top tier. New automaker VinFast remains the most ambitious -- and controversial. The company has been accused of design and manufacturing flaws that have led to accidents, and even fatalities. Despite this, VinFast, long on the periphery of Asia's auto narrative, is now at a strategic pivot.

By the end of 2025, VinFast had achieved a dominant, record-breaking position in Vietnam, accounting for 35% of the country's auto market share, according to Automotive Logistics. VinFast is also a leading EV manufacturer in Southeast Asia and has a new footprint in India, where it is investing $500 million in a new manufacturing plant in Thoothukudi, Tamil Nadu. VinFast is now considered the largest electric car brand in the country, competing heavily with Chinese EV manufacturers.

However, the story isn't only about individual EV brands, governments in the region are also taking action. According to FDI Intelligence coverage, Thailand, Vietnam, Indonesia and Malaysia have deployed a battery of tax breaks, subsidies and investment incentives to lure EV manufacturing and supply chain investment. These moves do more than attract plants, they signal a shift in Asia's broader industrial strategy away from legacy export networks toward new energy vehicle ecosystems.

In practice, this means Japanese automakers can no longer rely on preferential treatment or historical scale alone. Chinese brands with aggressive market pricing and government-aligned deployment strategies are capturing assembly footprint and downstream volume, while Vietnamese players layer in localized demand growth and regional supply chain diversification. This structural repositioning matters for Tokyo because it erodes not just market share, but capital-incentive gravity.

Behind closed doors, it appears executives at Japanese automakers are sounding the alarm. Bloomberg recently reported that Japan's "wait-and-see" approach to full EVs has moved from a conservative strategy to a critical risk as Chinese manufacturers (led by BYD) achieve unprecedented vertical integration and scale.

Not only have Japanese auto brands lost significant market share in Southeast Asia to Chinese brands but their combined share in Thailand, a key market, plunged from nearly 90% five years ago to 69% in 2025. Ultimately, Japanese auto brands simply can't compete on price. Chinese EV automakers BYD and Xiaomi can slash new auto prices far below what Japanese automakers offer because they lack the in-house battery supply chain that Chinese firms have access to.

As noted, Japan's survival currently hinges on its dominance in hybrids. But Bloomberg warned this is a "gilded cage." While hybrids are profitable now, they simply can't help Japan develop the software-defined vehicle (SDV) capabilities where China is currently leading. Moreover, Chinese EVs are being marketed as "smartphones on wheels." Bloomberg highlights that Japanese automakers are still struggling with software integration, leading to a perceived "tech gap" among younger consumers.

This leads to an inevitable reality for Japanese automakers: simply concede that they will have to survive as smaller niche players in an increasingly competitive and crowded market. The threat is no longer theoretical; it's an active displacement of Japanese industrial influence -- something Tokyo will find politically unnerving.