All sorts of memories flooded back to me during a brief ride through Tama Zenshoen, a gorgeous park in outer western Tokyo, but also home to a tragic and cruel past for Japan’s Hansen’s disease patients. Zenshoen is a leprosarium and for most of its history, the 115-year-old facility was shut off from the rest of the world and its inhabitants quarantined inside, sterilized and forbidden from associating with the outside world, largely based on 1951 testimony to the Diet by Kensuke Mitsuda, a staunch segregationist but also unfortunately Japan’s foremost expert on leprosy at the time. This continued for…