In alliance-happy auto industry, go-it-alone Honda the odd carmaker out

Honda Motor Co.'s go-it-alone strategy looks increasingly risky as an alliance-happy auto industry scales up to cope with the soaring investment needed for self-driving vehicles, electrified power trains, connected-car technologies and artificial intelligence. In the latest industry tieup, Toyota Motor Corp. and Mazda Motor Corp. on Friday announced plans to jointly invest in a $1.6 billion assembly plant in the U.S. with the capacity to produce 300,000 Toyota Corollas and a new Mazda crossover model starting 2021. Toyota will acquire about 5 percent in Mazda, which will hold a 0.25 percent in the bigger automaker. The duo will also combine engineering efforts on electric vehicle development and car-networking know-how. Honda President and CEO Takahiro Hachigo, like his predecessors, isn't a fan of big alliances that involve equity stakes.