During this period, Sanei got acquainted with Kazan WATANABE (a senior vassal of the Tahara Domain) and Choei TAKANO (a doctor and Dutch scholar) and joined Shoshikai to give a lecture on history and geography.
このころ渡辺崋山・高野長英と親交をもち、尚歯会に参加、歴史や地理を講じる。