A free game where you identify historical figures from hints about their deeds — and summon them as collectible cards. Working from 'what they did' to 'who they are' mirrors exactly how exams ask about people.
Questions are in Japanese (interface in English). Summoned cards come in rarities, and filling the collection keeps you coming back — memorizing history, turned into collecting.
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.)