[1] He was born in Tokyo in 1902, and graduated from Chiba Medical School in 1930.
In the same year he started working at Tama Zenshoen Sanatorium.
In Nagashima Aiseien Sanatorium, he was not only a good clinician, but also helped Kensuke Mitsuda when various problems arose.
He became the director of Kikuchi Keifuen Sanatorium after Matsuki Miyazaki.
Tajiri started reducing the number of in-patients after the so-called "no-leprosy patient in our prefecture" movement.