There are holiday emergency clinics and hospitals at every ward in Kawasaki city. Physicians and Pediatricians are available in 9–11:30am and 1–4pm on December 30th to January 4th.
As for consultation days and hours, please refer to the website below.
http://www.city.kawasaki.jp/shisetsu/category/34-9-0-0-0-0-0-0-0-0.html (External link)
Contact: Kawasaki Medical Association, Tel 044 711 3011
email: kawai-kyuujitukyuukan@kawasaki.kanagawa.med.or.jp