Children's book Time warp into the Sengoku period

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Children's Book
Historical Manga Timewarp Series Complete History Edition 8 / "Historical Manga Survival" Series is an enlarged and revised edition. Three elementary school children, Ryu, Kanon and Jun, who were time-warped during the Sengoku Period, meet with famous Sengoku Daimyo (Japanese territorial lord) such as Oda Nobunaga and Takeda Shingen to learn about history. Will they be able to return to the original era without any problems? There are many columns that give a good understanding of the Sengoku Period, such as the famous Sengoku Daimyo, what kind of work they usually did, and what kind of people were ninja.