While continuing to work as the vice-president of the Ryuchi-kai, Kawase was assigned to be a director of Yokohama Specie Bank the following year, and made efforts to set up the association for tea industry and expand the production and export of tea.
河瀬は龍池会副会頭の職務を続けながら、翌年には横浜正金銀行取締役に就任し、明治18年（1885年）には茶業組合結成に尽力して茶の生産・輸出の拡大事業に尽力した。