Hello Gabi. I used a company called ethiopian. My flight didn't go trough Japan. It was: Brasil - Lome - Addis Ababa - Bangkok. Some people said I shoudn't use this company because those countries in Africa might be intollerant, but I had my name and sex legally changed, so i didn't think it would be a problemn, and in fact everything was ok. The main reason I chose Ethiopian was the price, and because in febuary tikets get more expansive. I advise you to buy your tikets way before your trip, so you'll pay less, i should have done that. I had a friend that chose Emirates and was satisfied, airfrance seem like a good option as well No matter what company you choose, be aware of the necessity of vaccination against yellow fever - you have to go to anvisa to get the international certificate.
When I came to the airport, the clinics driver was waiting for me, with my name wrote in a paper (they send me an e-mail saying where he would be). The hospital accomodations are really good (they have a channel on youtube, take a look), and the nurses were amazing, all the staff actually. Their english is good, i didn't had problemns to understand them. After 5 days in the hospital, I was moved to the 7th floor, witch is like an hotel room, and i could call them if needed. I saw Dr kamol in the consultation before surgery, and some days later when he look at my surgery to make sure everything was ok. another great thing about here is that we have lots of grocery stores, pharmacies, mcdonalds, starbucks, a mini mall, in the same block as the hospital, so you can get your stuff like food without even having to cross the street. In the hotel they have washing machines for laundry (buy soap powder when you get here), a microwave to heat food, in a mini kitchen. I don't have complains so far =)
Sh1982, as I said, I liked the aftercare, the nursing team is fantastic, but i think Dr kamol could be present more often (my opinion). My surgery was the equivalent a 8700 USD dolars. With the other expenses (consultations fee, hotel, hospital, food) you'll end spending like 12-13k.