Prof. Ryuta Kawashima, who helped develop Nintendo's "Brain Age" games, is teaming up with Toyota to develop intelligent cars that will help seniors drive safely, the researcher said on Tuesday.

"We envision future cars will be able to monitor brain and emotional activity to back up elderly drivers," said Kawashima, a Tohoku University scientist who worked on Nintendo's best-selling "Brain Age" games - and whose smiling image is the guide in the series.

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