This project involved concept design, interiors renovation, and environmental features of the children's corner of Nakano City's Ekoda Library, located in a quiet residential area where children from the neighborhood gather. On the first floor, we replaced the old interiors materials with new ones and created a bookshelf unique to the children's corner, where large books and picture-story shows can be stored. We also created a magazine area for parents to enjoy, creating a space where parents and children can spend time together. In this space, where children are greeted by the library's original characters, "Shishimaru" and "Egotan," inspired by the "Ekoda Lion Dance," an intangible folk cultural property designated by the Tokyo Metropolitan Government, we aimed to give children the impression that libraries are fun places. On the second floor, we installed a new counter and chairs. By using acrylic material for part of the counter, it has become a space where you can quietly read while feeling the faint warmth of the sunlight.