Getting hair loss medicine online (finasteride)

My hair has been thinning this year and I am interested in buying finasteride online. Is there any clinic that can monitor my health while I on it (hormones etc for safety)? Usually clinics only monitor what they give you. I live in Yokohama.

I'm thinking something like this, 100 pills for 3k yen

https://osakado.clinic/detail/000074_finpecia.html#OS04476

(no shave your head like Bruce Willis comments)

by Medium-Elevator-9157