Furthemore, since 1884 when he had Kinsaku TAKESHIBA succeed to Shinshichi KAWATAKE III (the Third) and changed the name of Noshin KATSU to Noshin KAWATAKE, as a kyogen-sakusha (kabuki playwright), he had used until his death a signature of Mokuami FURUKAWA in every official document such as banzuke (playbill), shohon (promptbook) and daicho (kabuki scripts), thus leaving no evidence of using a signature of 'Mokuami KAWATAKE' by himself.
さらに明治17年（1884年）に竹柴金作に三代目河竹新七をつがせ、勝能進に河竹姓を与えて河竹能進と名乗らせてから死去するまで、狂言作者名としては番付・正本・台帳に至るまで古河黙阿弥と署名しており、本人がこれらに「河竹黙阿弥」と署したことは一度もない。