However, this became problematic around 1910 when the textbooks for teachers was revised, and this movement was further fueled by the "Kotoku Incident," which is said to have been caused by socialists such as Shusui KOTOKU and others.
ところが、1910年（同43年）の教師用教科書改訂にあたって問題化し始め、同年に幸徳秋水ら社会主義者が起こしたとされた幸徳事件がこれに拍車をかけた。