but
If 1 falls ill, it will bear high medical expenses.
In some schools, if foreign students don't pay, there will be no scholarships.
If you are going to work in Japan in the future and wait for a visa, it will have a certain impact.
Please weigh the pros and cons before making a decision.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.