Kaichumyogo (a pocketable paper with the name of Amida-nyorai written on it) of Hongan-ji School is the remains of what was given during wartime (Pacific war) to soldiers when they were called up.
本願寺派の懐中名号は、本来戦時（太平洋戦争）中に出征する兵士に持たせた物の名残である。