There are two main schools of Kyogen, the Izumi and the Okura. Kyogen performances and scripts of the two schools differ. In fact, traditions can differ even within the same school. There are three traditions within the Izumi school: Kyogen Kyodosha (Nagoya), the NOMURA Matasaburo Family (now residing in Nagoya), and the NOMURA Manzo and NOMURA Mansaku families (originally from Kanazawa). The Department of Intangible Cultural Heritage has studied Kyogen performances. As part of that research, SATO Tomohiko of Kyogen Kyodosha was recorded performing Hanago. Hanago is a piece primarily in the form of a ballad. Hanago is a naraimono, or a piece requiring special skills that one is not authorized to perform until reaching a certain age.