The performance of the hayashigoto in Noh by only the fuekata. The ikkan is more difficult than typical performances, and makes the sound of the flutes including the tone quality and breathing technique more easily enjoyed. One variation of the ikkan is icchō ikkan, in which there is one percussionist (kotsuzumi, ōtsuzumi, taikō) and one utai (sometimes not included) for each flute player.