Around 15 percent of the 105 Japanese patients who had sex change operations between 1995 and 2012 reported serious complications, while about 70 percent of the patients said they were satisfied with the results, according to a survey by gid.jp, an advocacy group of those living with gender identity disorder.
The survey was released on Wednesday as Japan celebrated the 10th anniversary in July of a special law allowing people with gender identity disorder to modify their gender in their family register provided they had a sex-change operation among other conditions.
This is the first survey of its kind, according to the Japanese Society of Gender Identity Disorder.
However, it is impossible to say if 15 percent, or 16 people, is a significant figure or not because every patient had a different operation, an expert said, according to Kyodo news agency.
The survey was conducted from August to October last year, with the 105 respondents being aged 22-80 and living in Japan at the time of the survey.
Five patients said they had “serious complications” after the surgery, such as urination problems and intestinal blockage. The surgeries were made at overseas hospitals and several clinics and hospitals in Japan.
Some overseas hospitals did not listen to complaints by patients after problems were found later, according to the survey.