Takashi Nagai was a Japanese Catholic physician specializing in radiology, an author, and a survivor of the atomic bombing of Nagasaki. His subsequent life of prayer and service earned him the affectionate title "saint of Urakami".

Matsue is the capital city of Shimane Prefecture, Japan, located in the Chūgoku region of Honshu. As of 31 March 2023, the city had an estimated population of 196,748 in 91287 households and a population density of 340 persons per km². The total area of the city is 572.99 square kilometres (221.23 sq mi). Matsue is home to the Tokugawa-era Matsue Castle, one of the last surviving feudal castles in Japan.