Two of Japan's most storied automakers, Honda and Nissan, have chosen collaboration over consolidation — agreeing to jointly develop the operating systems and core electronics that will define the next generation of automobiles. Where a full merger once seemed possible and then impossible, a narrower but consequential partnership has taken shape, born of economic pressure and the recognition that no single company can afford to build the digital foundations of modern mobility alone. Beginning in fiscal 2029, their shared architecture will quietly underpin vehicles that each company will still