I've read every now and then about how massages used to be mainly performed by blind people in Japan.
I couldn't find much info about the present-day situation in Japan, but I came across an article on a dispute about whether non-blind people should be allowed to do it in South Korea, part of a former Japanese colony, and a brief mention on WikiTravel in Taipei, capital of another former colony of Japan.
Does this still exist, especially in Japan, and is it accessible to foreign tourists? My Japanese is fairly basic and I can't speak Chinese or Korean, and I'm worried that someone being blind may make the language barrier worse.