It all started with a word from my son. When I asked my eldest son, who was two and a half years old at the time, who loved trains, about his request for a backpack for nursery school ... One word, "Consolidated!" I wanted something that combines the green and red Shinkansen that operates on JR East Japan. So I started looking for it, but it didn't exist in the world, so ... This product is completely made to order. At first, we had no intention of commercializing it, but it was well received by children who also liked trains, so we commercialized it after obtaining permission. It continues to the present. The target age is from 2 to 5 years old. It is intended for preschoolers who act with their parents. Patented "self-supporting structure" and "zipper opening with smooth opening and closing". In addition to basic performance such as "lightweight" and "durable", it also incorporates functionality suitable for the target age, such as a strap that is easy to carry on your back and a D-ring in the side pocket. In addition, instead of making a cute design because it is for children, it is finished in a design that pays attention to details that will convince train lovers.