Dr Kawashima's Brain Training for Nintendo Switch, also known as Nintendo Switch Brain Training for Adults in Japan, is the fifth entry in the Brain Age puzzle video game series, based on the research of neuroscientist Ryuta Kawashima, whose avatar guides the player through the game. It was co-developed by Nintendo EPD and indieszero, and published by Nintendo for Nintendo Switch. It was released on December 27, 2019, in Japan, and January 3, 2020, in Europe and Australia. The game was not released in North America.