Masahiro Moro told Fortune that EVs other than Tesla are "not taking off" in the US.
Elon Musk's carmaker still dominates the US market, despite growing competition from rivals.
EVs face a reckoning amid slowing demand with auto companies cutting spending and reducing targets.
Mazda's CEO has said that Tesla is the only company seeing real success in a fragile EV landscape, with other electric cars "not taking off."
"EV is absolutely important technology, and we are developing it. But [in the US] EVs last year [were] about 6% of the market. This year it is 8%. And out of that 8%, 57% was Tesla. Other EVs are not taking off, inventory is piling up," he said.
Tesla continues to dominate the US EV market. While Elon Musk's company has cut prices multiple times in the past year in the face of competition from legacy automakers, it still commands over half the market, with experts estimating that it will take a decade for rivals to catch up.
Unlike automakers like Ford and General Motors, who have unveiled their own EV ranges in an attempt to challenge Tesla, Mazda has been more cautious.
The company has said that it wants at least 25% of its cars to be electric by 2030. It recently killed off its only EV sold in the US, the Mazda MX-30, after reportedly selling just 66 of them this year. It continues to be sold abroad, however.
Moro's comments come at a moment of reckoning for the EV industry. Major auto companies have cut back on targets and spending amid slowing demand, with dealers having to turn away supplies and a lack of cheap EV options hurting adoption.
Despite this, sales are on the rise, with more than 1 million electric vehicles expected to be sold in the US this year for the first time, according to Atlas Public Policy.
Moro suggested that a lack of charging stations was one of the major reasons why companies are struggling to hit their target of producing only zero-emission vehicles.
"How we get to zero is up to consumer choice and social infrastructure," he said.
Mazda did not immediately respond to a request for comment from BI, made outside normal working hours.
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