A study by researchers at Tohoku University’s Institute of Development, Aging and Cancer suggests that driving a manual transmission vehicle may provide cognitive benefits by engaging the brain more actively than an automatic. Led by Professor Ryuta Kawashima, known for his work in neuroimaging and contributions to Nintendo’s Brain Age series, the research found that operating a clutch, gear lever and pedals stimulates the prefrontal cortex, a region associated with memory, attention and decision making.

According to the study, the coordination required to drive a manual creates a continuous mental workload that may help keep the brain engaged. Researchers suggest regular manual driving could contribute to maintaining cognitive function, particularly as people age, although further research is needed to determine any long term health benefits.

Despite this, manual transmissions continue to disappear from new car lineups. In Japan, they account for just 1–2% of new vehicle sales, while in the United States the figure stood at approximately 0.7% for 2024 models. European markets remain stronger, with manual take rates of around 41% in Spain and 48% in Italy. As of 2026, only about 24 new vehicle models are still offered with a manual gearbox in the U.S. market.

While the findings do not prove that driving a manual transmission prevents cognitive decline, they add to growing research suggesting that mentally engaging everyday activities may play a role in supporting healthy brain function.

So the next time someone asks why you still drive a manual, you can simply tell them it’s not just good for the soul, it might be good for the brain too.