A free civics game that makes Japan's constitution, politics and economics personal. Alongside knowledge quizzes, 'What would you do?' scenario questions push you beyond memorization into real understanding.
Questions are in Japanese (interface in English) — a window into how Japan teaches civics for the age of adulthood at 18, from voting rights to avoiding contract trouble.
Answer the same question correctly twice and it graduates into a mastery card; the ranking counts how many cards you have collected. You can drill only the questions you got wrong, and every day you play adds a study stamp. No sign-up is required and your records stay on your own device. (The questions themselves are in Japanese.)