He also published 'Futari Nyobo' (Two Wives) in which he tried the vernacular style with 'dearu' ending of sentences from the middle of the story, and these achievements made him one of the leaders of literary circles during the Meiji Period along with Rohan KODA, so, this period was called Ko-Ro Jidai (the era of Koyo and Rohan).
このほか「である」の言文一致を途中から試みた「二人女房」などを発表、幸田露伴とともに明治期の文壇の重鎮となり、この時期は紅露時代と呼ばれた。