I got my primary care doctor from a family member recommendation. Most specialists I see are based on her recommendation (even if there’s not a formal referral). My wife has a less-common medical condition and found her primary care doctor from a local Facebook group for people with the condition where people were sharing doctors they’d had good experiences with.
I think that insurance I had in the past or currently has some sort of lookup for doctors in-network and people were able to leave reviews. I’ve actually had some success with that, trying to see from the reviews who I might jive with. I feel like I’ve had more success from talking with people and seeing if they like their doctor, though.
I got to visit the last time I went to see my dad’s side of the family in Oregon and I realized that the Pacific Northwest probably gives a pretty similar climate to much of Japan. I’ve never been to Japan but had moments where I felt like I was actually there.