SoftBank's 14% surge pushes market cap to ¥48 trillion, overtaking Toyota for the first time since 2000. The AI-driven flip hinges on OpenAI and SB Energy IPOs.
SoftBank Group Corp. overtook Toyota Motor Corp. as Japan’s most valuable company on Monday, a milestone last achieved briefly during the internet bubble in 2000. SoftBank shares climbed 14% in Tokyo trading, pushing market capitalization above ¥48 trillion and surpassing Toyota’s ¥46 trillion. The rally has lifted SoftBank more than 90% this year; Toyota shares have fallen more than 10%.
The flip underscores how rapidly investor preferences have shifted toward AI-centric companies. SoftBank benefits directly from the AI infrastructure buildout and a pipeline of portfolio IPOs. Toyota faces macro headwinds in China, geopolitical friction, and a market that is punishing legacy auto exposure.
“This epoch-making event symbolizes the AI boom,” said Kazuhiro Sasaki, head of research at Phillip Securities Japan Ltd. “Extraordinary conditions are emerging around expectations for massive IPOs in the US.”
SoftBank’s rally accelerated after reports last month that two high-profile portfolio companies – OpenAI and SB Energy Corp. – were preparing potential US listings. SoftBank has committed close to $65 billion to the ChatGPT developer, giving it roughly 13% equity by October. The market is pricing future liquidity events, not current earnings.
The company over the weekend announced plans to invest as much as $87 billion to build AI data centers in France. The capex spending fuels optimism about increasing demand for AI infrastructure. Arm Holdings Plc, SoftBank’s chip-design unit, also gained after Nvidia Corp.’s earnings results reinforced conviction that AI demand will spread across industries.
Toyota’s decline stems from a different set of pressures. The automaker’s shares have dropped more than 10% this year. A weak yen, competition from BYD and other EV makers, and trade uncertainty have weighed on the sector. The AlphaScala Alpha Score for TM is 42/100 (Mixed), reflecting headwinds relative to other consumer discretionary names. This is not a distressed balance sheet – Toyota remains Japan’s largest automaker by volume – but the growth narrative has evaporated.
Japan’s memory-chip maker Kioxia Holdings Corp. is now hovering around ¥40 trillion in market cap, making it Japan’s third-most valuable company, surpassing Mitsubishi UFJ Financial Group. The NAND flash chip supplier expects current-quarter earnings to exceed the entire prior fiscal year because of AI data center demand for storage. This is a direct read-through: the AI supply chain is broadening beyond GPUs into memory.
Arm’s valuation has been supported by Nvidia earnings and growing conviction that AI demand will spread. SoftBank’s controlling stake means any Arm rally flows directly to SoftBank’s book value.
SoftBank was the biggest boost to the Topix on Monday; Toyota was the largest drag. This is not a one-day event – it reflects a structural repricing that could continue as long as AI capex remains elevated.
The SoftBank-Toyota flip is the most visible symptom of a market betting on AI monetisation years before the cash arrives. SoftBank’s valuation now relies on the successful execution of at least two major IPOs, continued Arm strength, and no serious competitor eroding OpenAI’s position. Toyota, by contrast, is cheap but directionless in the current rotation.
For anyone watching Japanese equities, the real question is not whether SoftBank is too expensive – it is whether the AI pipeline will deliver the liquidity event the stock price already assumes. If it does, the ¥48 trillion cap is a floor, not a ceiling. If it does not, the gap between market cap and tangible assets is wide enough to snap back hard.
For more on Toyota’s fundamentals, see the TM stock page. Broader market context is available on the stock market analysis page.
Prepared with AlphaScala research tooling and grounded in primary market data: live prices, fundamentals, SEC filings, hedge-fund holdings, and insider activity. Each story is checked against AlphaScala publishing rules before release. Educational coverage, not personalized advice.