Honda Motor Co. Ltd. (NYSE: HMC) and Nissan Motor are moving toward a software alliance. On August 29, Reuters reported, citing Japan's Nikkei newspaper, that the two automakers could reach an agreement as soon as the following Monday to jointly develop a vehicle operating system and onboard computer. The partnership would target new models arriving as early as 2029 and represents the clearest indication yet that the two Japanese manufacturers are rebuilding cooperation more than a year after their $60 billion merger talks collapsed. The reported framework also includes Mitsubishi Motors, which joined the strategic partnership the two companies formed after the merger discussions ended.

Two Rivals Finding Common Ground

Honda told Reuters it is discussing "potential areas of collaboration" with Nissan and Mitsubishi Motors under their existing strategic partnership, while stressing that no deal has been finalized. A Nissan spokesperson said the company is exploring "various possibilities" and would share details once something is confirmed. Nissan CEO Ivan Espinosa said earlier this month that talks with Honda over software collaboration were underway, and on Honda's fiscal first-quarter earnings call, management confirmed it is exploring cooperation with Nissan on software-defined vehicles, batteries, and shared vehicle platforms to pool volume across both companies. A shared computing platform could allow Honda to spread the cost of software development across a far larger base of vehicles, an advantage smaller automakers rarely achieve on their own.

The software push reflects a broader industry shift. Automakers worldwide are racing to restructure vehicles around centralized computing and over-the-air updatable software, a transition pioneered by Tesla and now pursued by rivals including Volkswagen Group with its partnership with Rivian and Toyota with its own Arene operating system effort. Developing such systems in-house is capital-intensive, and several manufacturers have turned to partnerships or shared platforms to keep pace. For Honda and Nissan, which both trail larger rivals in software investment scale, sharing an operating system and onboard computer is one way to spread that cost while keeping their brands and vehicle lineups separate.

The potential collaboration comes as Honda's core business is performing better than expected. Operating profit for the fiscal first quarter, reported August 5, reached a record JPY530.7 billion, driven by an all-time high JPY233.9 billion in motorcycle profit on strong demand in India and Brazil. Automobile operating profit held at JPY192.1 billion despite difficulties in China, a 5% margin that management attributed partly to a JPY78.1 billion positive tariff impact. In the United States, high gasoline prices pushed buyers toward Honda's hybrids, and the company captured a 10% share of the market in April and May, its best showing in five years. Management responded by raising full-year operating profit guidance to JPY650 billion and adjusted operating profit, which excludes EV-related losses, to JPY1.17 trillion, while holding the dividend at JPY70 per share and maintaining a JPY3.3 trillion net cash position.

Where the Story Gets Complicated

China remains the biggest drag. Management said the country's combustion-engine and hybrid market shrank by about 40% in the quarter, and Honda's retail units there fell 50% year over year, even after the company moved early to extend its joint venture with GAC through 2028 to reassure dealers. Domestic Chinese automakers, led by BYD, have captured the bulk of their home market with aggressively priced hybrids and EVs built on fast, locally developed software, and that competitive pressure is a key reason Japanese automakers are restructuring their China operations and pooling technology investment elsewhere. Honda is also still absorbing the cost of its shifted EV strategy, forecasting JPY520 billion in EV-related losses for the full year, a figure revised to reflect foreign exchange effects on compensation talks with North American suppliers that remain unresolved.

A July 28 earthquake in Kumamoto forced a nine-day production halt at Honda's plant there, with Saitama and Suzuka also losing several days each due to supplier damage. CFO Masao Kawaguchi said the company still does not know how much the disruption will affect unit sales. Management is also holding conservative assumptions on Middle East-driven raw material costs given the uncertainty in the region.

The Nissan software deal itself is not yet certain. Both companies have publicly declined to confirm the Nikkei report, and the same two automakers walked away from a $60 billion merger less than two years ago, a reminder that talks between them do not always end in an agreement.

What the Market Is Weighing

Hedge fund ownership held steady at 21 funds in the most recent quarter, unchanged from the prior one, suggesting institutional investors are not rushing in or out on the Nissan news. Shares carry a short interest of just 0.20% of float, a level low enough to signal almost no organized bet against the stock. Honda trades at 24.27 times forward earnings as of August 28. That multiple leaves room for the software partnership and raised guidance to influence the stock if either develops further, without much growth already priced in.

Where This Leaves Honda

Honda's fiscal first quarter showed a company able to post record profit even as China weakens and EV losses mount, and the prospect of sharing software costs with Nissan adds a longer-term element to watch. However, the deal described by Nikkei remains a report, and Honda and Nissan have a recent history of talks that ended without a transaction. For the software alliance to matter, it needs to move from "potential areas of collaboration" to a signed agreement with real cost savings attached, and the 2029 target for first models means any payoff would arrive years after signing.