Haru is when the vocals or kakegoe are sung in a higher pitch. “More haru” thus means “increase the pitch.” The vocals are divided into three pitch levels: high, medium, and low, and rising from the medium to high level, for example, is also referred to as haru. Furthermore, when it becomes cold in the winter and the drum skin on the kotsuzumi or ōtsuzumi dries out and the pitch becomes even more profound, the “the leather is haru” is also used.