Japan National Tourism Organization published the list of foreigner-friendly hospitals. You can search the nearest hospitals wherever in Japan that are available in multiple languages, 365 days/a year and 24 hours/a day. 

http://www.jnto.go.jp/eng/arrange/essential/emergency/mi_guide.html#search

 Another Website for Searching English available hospitals and clinics in Saitama.

http://inhos.net/search/Saitama/index.html