Dentist budget for implant is 630k yen help

Hi, my dentist is trying to charge me 630k yen, is this normal? he didnt give me any other option just this, and says hokesho doesnt cover anything.

Are these the normal prices for an implant?

I was expecting it to be expensive but not this expensive.

https://preview.redd.it/o3oeu5lfguad1.png?width=1013&format=png&auto=webp&s=dd94f8951b744bfde512e281f4ea7a78035410a9

I understand the zirconia porcelain is not covered by hokensho and it is expensive, but shouldnt the other things be covered?