★ TONS OF MYSTERIES Watershed Search Rain falling from the sky becomes rivers and flows to the sea. The boundary that divides that rain into this river and that river is the "watershed." The author, awakened to the existence of watersheds when crossing a mountain pass by train, backpacks and searches for watersheds near and far. Eventually, they discover large watersheds on maps of Japan and the world. This is a perfect book for a summer vacation research project. With a Mystery Newspaper There are minor corner scuffs, small scratches, and page creases on the cover. The pages inside seem to have little wear and tear. ★ TONS OF MYSTERIES Every Port and Inlet Why are there so many station names with the characters for "tsu" (port) and "ura" (inlet), such as "○○tsu" and "○○ura"? The author, wondering about this, connects those stations on a map with lines... and they form the shape of the Japanese archipelago! The author investigates stations with the "san" radical (related to water) in their names, researches in books, and listens to the stories of local people to explore where railways are laid. The book reflects on the efforts of people in the past who built railways in Japan, a country with many mountains and limited flat land. With a Mystery Newspaper There are some minor scratches, but Overall, it seems to have little wear and tear. The price includes shipping. If you can combine it with other picture books, we will offer a 200 yen discount, so please consider it. Click here to see all "Tons of Mysteries" books. #1215 Tons of Mysteries #1215 Picture books with nature as a theme #1215 Picture books with natural phenomena as a theme #1215 Picture books with lifestyle and culture as a theme #Yusaku Nosaka #Research Study