A game to memorize words and phrases that appear in junior high school historyA game-style educational app for memorizing "historical phrases" for junior high school students. A 4-choice format where you can guess the “phrase” and “era”.●Questions・A game where you have to guess the correct answer from 4 options as to which era the ``phrase is.・15 questions asked in one session・High score if shot down in the middle of the target・The aircraft grows according to the score●Memory・Summary of each era・Classified by year, people, culture, battle, and politics●Achievement level・Display the progress of each era in a graph.※NoteIn junior high school textbooks, the scope of world history is not marked in accordance with Japans period divisions (particularly Jomon and Yayoi), but in this app we have forced them to do so in order to match world events with a sense of the times.