Yatsu-wari

It is the rhythm of the part of the song or hayashi that matches the beat is basically eight beats as one unit (there are also variants of six beats, four beats and two beats), and this is called eight beats (Yatsu-boshi or yahoshi). There are three rhythm types of byoushi-ai (8 beats as one unit), hira-nori, chuu-nori, o-nori. It is called “yatsu-wari” and it is assigned to eight beats according to the principle of each nori.