He completed the political and economic theories titled "Shinsaku" that corresponded to "5 volumes of sho, 9 volumes of gi, 23 volumes of saku" in 1804 when he was in Hiroshima, and later revised and titled it as "Tsugi".
また「五書・九議・二十三策」にあたる政治経済論の『新策』は広島在住時の文化元年（1804年）に完成したが、のちにこれを改稿して『通議』とした。