vaccination for "yochien" in Japan?

Military family looking to relocate to Japan and I would like to put my middle in Japanese yochien but I am worried that immunization status may be an issue.

Vaccination is not compulsory, but Article 19 (Suspension of Attendance) of Section 4 "Prevention of Infectious Diseases" of the School Health and Safety Act states, "The principal has or is suspected of having an infectious disease. ``If there is a child or student who is at risk of such an incident, their attendance may be suspended pursuant to the provisions of a Cabinet Order.''
In Akita Prefecture, during the measles outbreak in 2008, Akita Prefecture applied regulations and suspended those who had not been vaccinated from attending, leading to a quick end to the outbreak. If so, there is a possibility that your attendance will be suspended as well.
https://www.jpa-web.org/dcms_media/other/%E4%BF%9D%E8%82%B2%E5%9C%92%E...
https://www.jpa-web.org/blog/uncategorized/a101
For details, please check with the yochien you are planning to enroll at.