Of the 4,500-odd poems of the collection, they prepared readings for around 4,100, which included virtually all of the collection's "tanka" (poems with a 5-7-5-7-7 metre) and roughly half of the "sedōka" (5-7-7-5-7-7), but hardly any of the "chōka" (longer poems with an indefinite number of 5-7 verses and concluding 5-7-7).