This summer, that game where you catch monsters with your smartphone became a big boom. A park in Kinshicho, Tokyo, where many rare monsters appear, is called a “sacred place” and is crowded with people day and night. Adults were playing on their smartphones while children were playing on the playground equipment. Some stayed up all night playing for 10 hours or more, while others were elderly couples on dates, and some even started picking up girls.... Three days spent in a mysterious park in a corner of the big city.