Hannah Riddell
Keisai Aoki (real name Yasujiro Aoki) was born in Tokushima Prefecture on April 8, 1893. At the age of 16 he developed leprosy and everything did not help, including the pilgrimage of 88 holy places of Shikoku (at that time it was believed to be of help). In 1916 he entered the Oshima Leprosarium and was baptized in 1918 as a Christian. He helped with missionary work, and he sent a letter to Hannah Riddell since he was worried about women's temptation. At Kusatsu, he met Riddell who was vacationing there and decided to go to Kaishun Hospital, where she was the director. He helped with her missionary work in the facility, which he described as having an almost monastic atmosphere.