Living in Munich, Naojiro studied under Gabriel von Max, who was a painter and a friend of Toyokichi HARADA, his older brother, and registered himself in the Munich Academy.
ミュンヘンに住み、兄原田豊吉の友人画家ガブリエル･マックスに師事し、またミュンヘン･アカデミーに登録。