Doraemon's Study Series Doraemon's Fun Guide to Social Studies Japanese History ① Paleolithic Era to Heian Period Japanese History ② Kamakura Period to Early Edo Period Japanese History ③ Late Edo Period to Present Day Environmental Issues and Our Lives Set of 4 books If you wish to purchase individually, it's 600 yen per book. Read once. I am an individual seller. Please refrain from purchasing if you are overly concerned about details.