Nintendo deployed deep learning technology in the game Dr. Kawashima's Brain Training for Nintendo Switch, enabling the console's infrared camera to recognize the shape of players' fingers for in-game exercises.

Nintendo's internal research subsidiary NERD (Nintendo European Research & Development), based in Paris, developed the deep learning middleware used in Dr. Kawashima's Brain Training for Nintendo Switch (released late 2019 in Japan, early 2020 in other regions). The system uses the Joy-Con's IR Motion Camera as input and a trained neural network to classify hand shapes — for example, distinguishing rock, paper, and scissors gestures — enabling touchless gesture-based gameplay. This was confirmed on NERD's official website, which describes the technology as developed 'in close collaboration with the game development team in Japan.'