With the Osaka Kirisitan Incident and Siebold Incident as a start, the crackdown toward Dutch scholars was becoming more violent, and Tenyu's teacher, Sokichi also closed the school and lived in seclusion temporarily, however, Tenyu continued to be confronted with an opposition in order to hand on the torch of Western learning in Osaka in unbroke transmission down the ages.
大坂切支丹一件、シーボルト事件を契機に弾圧が厳しくなり、師の宗吉も塾を閉鎖して一時隠棲するが、天游は大坂蘭学の灯を消さぬため公儀と対峙し続けた。