Health insurance covers judo therapy for the following clearly external (traumatic) injuries: bone fractures, dislocations, bruises, sprains, and torn muscles. (Conditions due to internal (medical) disorder are not covered by health insurance. In addition, any injury must not have become chronic to be covered by health insurance.)
In principle, you must first pay such costs and receive reimbursement later. However, in municipalities where the local social-insurance bureau directors have established an agreement with your judo therapist (specifically, an agreement on acceptance and entrustment), you may receive immediate insurance benefits upon presentation of your My Number Card or Eligibility Verification Certificate, etc. to your judo therapist.
You must have approval from a doctor to obtain judo therapy for bone fractures and dislocations, except in the case of first aid.