In 1890 Taguchi became deputy chairman of the Tokyo assembly, and in 1894 formed a council for reform of imperial financial affairs (the Teikoku Zaisei Kakushin Kai) with Saburo OZAKI, and was also elected a member of the House of Representatives the same year.
明治23年（1890年）には府会副議長となり、明治27年（1894年）には尾崎三良らと帝国財政革新会を結成し、この年には衆議院議員に当選する。