Why are genital massages so expensive in Japan?

JabKasai (Thai testicle massage) began to be treated as a “health” massage in Japan four or five years ago. At that time, there were few practitioners and it was very rare. I was one of them. 30,000 yen for 120 minutes became the average in Japan to differentiate from erotic massage and as a technical fee.
The concept of genital massage in modern health was not very common.
JabKasai has more practitioners and is now finally becoming known in Japan. Now, the Japanese are crazy about JabKasai. And the prices have gone up, with some places charging 50,000 yen for 120 minutes or 70,000 yen for 180 minutes for JabKasai only.
But honestly speaking, it is said that there are few people who can offer real treatment due to lack of technical skills.

In this trend, genital massages performed by Japanese women are expensive in Japan.
I am sure that there is a big difference in the sense of value for people from overseas.

Genital massage by a male therapist is cheaper than by a female therapist.