Kokugakuin University
Hirohito was a researcher of Japanese graves and missionary history in South America with a focus on Peru. He was the Japanese editor for the Japanese-language Peru newspaper "Peru Shinpō". He graduated from Kokugakuin University with a degree in Shintō studies. He was devoted to the study of "Suika Shintō", a branch of Shintō developed by Yamazaki Ansai, religious sociality, and the religious activities of Lafcadio Hearn.