Dr. Hosobe is a pediatrician and the director of Hosobe Pediatric Clinic, located in Bunkyo-Ku, Tokyo. She previously worked at Nagoya City University Hospital and Nippon Medical School Hospital before opening her own clinic. In addition to treating children, Dr. Hosobe also writes and supervises books, conducts educational activities regarding vaccinations, and runs a children's center. Her extensive experience raising two sons and a grandson has led her to support child-rearing in the community actively.