He returned to the Aizu Domain and became a professor of the Nisshinkan school when he was 28 years old, and then opened a place for Dutch studies and served as the professor, but he was placed in confinement for one year because he criticized the old-guard crony.
28歳でいったん会津に戻り日新館教授となり、蘭学所を開設して教授になるが、守旧派批判により1年間の禁足処分に。