Many choka poems are found in "Nihonshoki" (Chronicles of Japan) and "Kojiki" (The Records of Ancient Matters), most of them are in the form with 5-7 phrases repeated at least three times.
「日本書紀」や「古事記」の中に多くみられ、五音と七音の句を3回以上繰り返した形式のものが多かった。