Previously, the directors of the sanatorium came from the Police Section of the Okinawa Prefecture, and he was the first physician-director.

"As the director of this sanatorium, I will treat your diseased body as well as your soul, and thereby, will let your walk on the road of light, and let you be brought to life (Yomigaeru) through God.

On April 25, 1935, an organization, "Yomigaeri No Kai", was formed with 20 Christians and 30 people interested in his religion.

He was popular with the patients since barbed wire fences and a special prison were not built.

Michiko Ito, a Christian nurse who worked with Iesaka in Okinawa Airakuen Sanatorium said that he was a liberal person with a view against the segregation policy of leprosy patients.