Brain Age: Concentration Training, also known as Dr. Kawashima's Devilish Brain Training in some regions, is a puzzle game for the Nintendo 3DS. It belongs to the educational genre and is designed to improve players' mental abilities, particularly focusing on enhancing their working memory and concentration. Developed by Nintendo in collaboration with neuroscientist Dr. Ryuta Kawashima, it offers a series of brain-training exercises and mini-games that get progressively more challenging in order to provide a stimulating cognitive workout. The game also tracks progress and adapts to the player's performance.