One Noh song is composed of a number of small steps. “Rongi” is one of the names of the small steps. The role (mostly shite) and the Jiutai- local song, or the role and the role are sung in the conversation’s form of a question-and-answer. Many of the style Noh as Waki Noh and Wazura mono Noh have rongi, and the order of “kuri, sashi, kuse, rongi, and nakairi” is standard. It is said to have adopted the form of “theory” of Buddhist rituals, and is sometimes referred to as “theory”. It is sung according to the time rhythm.